assignment science class 8

NCERT Solutions for Class 8 Science

Chapter Wise Class 8 Science NCERT Solutions Chapter 1. Crop Production and Management Chapter 2. Microorganisms: Friend and Foe Chapter 3. Coal and Petroleum Chapter 4. Combustion and Flame Chapter 5. Conservation of Plants and Animals Chapter 6. Reproduction in Animals Chapter 7. Reaching the Age of Adolescence Chapter 8. Force and Pressure Chapter 9. Friction Chapter 10. Sound Chapter 11. Chemical Effects of Electric Current Chapter 12. Some Natural Phenomena Chapter 13. Light

Revised and simplified NCERT Solutions for Class 8 Science in English and Hindi Medium updated for session 2024-25 based on new syllabus. Now there are only 13 chapters in class 8 Science instead of 18. Class 8 Science NCERT solutions hold significant importance for students, educators, and the learning process as a whole. Here are some key reasons why Class 8 Science NCERT solutions are important during study.

Get NCERT Solutions for Class 8 Science

Class 8 Science covers a variety of foundational scientific concepts. Solutions provide clear explanations, helping students understand these concepts thoroughly.

Class 8 Science solutions guide students through solving a wide range of scientific problems. This aids in developing problem-solving skills, critical thinking, and logical reasoning. Solutions include practice exercises that allow students to apply what they’ve learned.

Science is critical for understanding the human body, diseases, and medical treatments. It informs healthcare practices, leading to improved health outcomes and longer life expectancy. Regular practice using these solutions helps reinforce understanding and memory retention.

Since NCERT textbooks are the primary source for board exams in many regions, including Bharat, a strong grasp of the concepts covered in Class 8 Science NCERT Solutions can lead to better performance in the exams. Class 8 is a preparatory stage for more complex subjects in higher grades. Solutions provide practice questions similar to those that might appear in exams, helping students prepare effectively.

Concepts often incorporate diagrams, illustrations, and images to visually explain concepts, making them easier to understand. Class 8 Science NCERT solutions are aligned with the curriculum and exam pattern. Practicing with these solutions helps students prepare effectively for assessments and exams.

In an era of environmental challenges, science education is vital for raising awareness about issues like climate change, pollution, and biodiversity loss. It equips students with the knowledge to address these issues responsibly.

Teachers can use solutions as a guide to explain concepts effectively in the classroom. Class 8 Science Solutions offer insights into age-appropriate teaching methods. Solutions offer explanations that parents can use to clarify concepts to students. This fosters a collaborative learning environment at home.

NCERT Solutions Class 8 Science can be used as part of a comprehensive exam preparation strategy that includes reading the textbook, practicing with previous years’ question papers, and seeking additional help from teachers or tutors. A strong understanding of Class 8 Science concepts is essential for pursuing science and related subjects in higher education.

Chapter Wise Class 8 Science NCERT Exemplar Book with Answers

• Class 8 Science NCERT Exemplar Questions
• Class 8 Science NCERT Exemplar Answers (1-13)

Many solutions relate scientific concepts to real-life scenarios, helping students understand the practical relevance of what they’re learning. Solutions encourage students to think scientifically, fostering an appreciation for inquiry, experimentation, and evidence-based reasoning.

Class 8 Science NCERT Solution covers various branches of science (physics, chemistry, biology), contributing to a well-rounded understanding of the subject. Class 8 Science NCERT Solutions serve as a valuable tool for students to prepare effectively for their exams. They provide clarity, practice, and a structured approach to studying the subject, ultimately helping students perform well in their Class 8 Science exams.

The 8th Science Solutions are closely aligned with the NCERT curriculum, ensuring that students cover the required topics and concepts. In essence, Class 8 Science NCERT solutions play a crucial role in building a solid foundation in science, nurturing critical skills, and preparing students for more advanced scientific learning. They offer structured guidance for understanding concepts, practicing problem-solving, and engaging with the subject in a meaningful way.

Download NCERT Solutions for 8th Science all chapters updated for academic session 2024-25. All the answers are done properly under the guidance of subject experts. For any error, please give your feedback, so that we can modify the contents. We are trying to provide the best form of NCERT Solutions for class 8 all subjects in 2024-25.

Class 8 Science Solutions and Main Points for NCERT Books

Chapter 1: Crop Production and Management

In Class 8 Science Chapter 1, we will study about Agricultural Practices. More about Rabi and Kharif Crops and preparation of soil – ploughing using Plough, Hoe and Cultivator. Here, we will learn about sowing with traditional as well as modern tools. Chapter 1 of 8th Science , describes the use of Manure and Fertilisers on crops and the methods of replenishing the nutrients of soil through crop rotation. Use of irrigations and their methods, protection from weeds and use of weedicides given properly.

Chapter 2: Microorganisms: Friend and Foe

In Class 8 Science Chapter 2 we will learn about microbes. Do you know? Microbes can be classified into four major groups – bacteria, fungi, protozoa and some algae. Viruses are also known as Microscopic Organisms but they reproduce only inside the cells of the host organism. Common ailments like cold, flu and most coughs are caused by viruses. Serious diseases like polio and chickenpox are also caused by viruses. Corona [ COVID – 19 ] viruses also have made a disaster in all over the world. Harmful microbes cause or spread diseases whereas useful microbes also which are helpful for the environment as well as for the living of Human beings.

Chapter 3: Coal and Petroleum

In Class 8 Science Chapter 3 starts with the intro of Inexhaustible Natural Resources and Exhaustible Natural Resources. We have to study deeply about Coal, means formation, users and availability everything including Coal Gas, Coal Tar and Coke.

Mining and refining of Petroleum is also an interesting topic in Chapter 5 of Grade 8 Science . Natural Gas – CNG is also an important topic to study for exams. These all are natural resources and limited in quantity. So, we should use natural resources carefully and wisely.

Chapter 4: Combustion and Flame

In Class 8 Science Chapter 4 we will study about Combustion. Every combustion needs fuel. Do you know that the substance that undergoes combustion is said to be fuel (combustible)? Combustion of materials needs the oxygen and ignition temperature. The minimum temperature required to burn a substance is known as Ignition temperature .

The substances which have quite a low ignition temperature, they can easily catch fire with a flame. So, these are called inflammable substances. We should be careful about such substances and keep it away from the flame. Sometimes a material suddenly bursts into flames, without the application of any apparent cause, this is called spontaneous combustion.

Chapter 5: Conservation of Plants and Animals

In Class 8 Science Chapter 5, we will study about deforestation and its causes. Do you know that due to human activities the fertile land gets converted into deserts? It is called Desertification . We should more about Wildlife Sanctuaries, National Parks and Biosphere Reserve.

As we know that the plants and animals found in a particular area are termed flora and fauna for that area. So, we should preserve our flora and fauna. We should be more careful and protective about Endemic species, which are found exclusively in a particular area. We should know more about Endangered Animals whose numbers are diminishing to a level that they might face extinction.

Chapter 6: Reproduction in Animals

In Class 8 Science Chapter 6, we will study about the mode of reproductions like Sexual Reproduction and Asexual Reproduction . In sexual reproduction, male and female reproductive organs get involve. The male gamete is known as sperm and the female is known as ova. After the fertilisation , the zygote is formed with later on converted into an embryo. When, in embryo, all the body parts can be identified, now it is called a foetus. Budding and fission are common ways to generate the new young one in asexual reproduction.

Chapter 7: Reaching the Age of Adolescence

In Class 8 Science Chapter 7 we are going to discuss the period of life, when the body undergoes changes, leading to reproductive maturity, is called adolescence. normally the adolescence starts from the age of 11 and lasts up to 18 or 19 years of age. This period covers about thirteen to nineteen years of age, that is why adolescents are also called ‘teenagers’. The period of adolescence may vary from one person to another. At the age of puberty, there may observe the increase of height, change in voice, change in body shape and development of sex organs. In females, the reproductive phase of life begins at puberty and generally lasts till the age of approximately 45 to 50 years.

Chapter 8: Force and Pressure

In Class 8 Science Chapter 8 we are going to know about the terms related to forces and pressure. We know that any push or pull on an object can be treated as a force. The interaction between two objects results in a force between the two objects. If the forces applied on an object in the same direction, the net force can be obtained by adding one another whereas if the two forces act in the opposite directions on the object, the net force acting can be calculated by subtracting them. The strength of a force is known as the magnitude of the force. A force may bring a change in the state of motion, shape or position of an object.

Chapter 9: Friction

In Class 8 Science Chapter 9 we will learn about the force of friction and the factors which affect the friction. We know that friction is a necessary evil. It reduces the force but it is useful in most the actions. A moving object would never stop if there were no friction. The substances which reduce friction are called Lubricants . In some machines, it may not be advisable to use oil as a lubricant. We can reduce friction by putting an air cushion between the moving parts. Rolling of one body over the surface of another body, the resistance to its motion is called Rolling Friction . The frictional force on an object in a fluid depends on its speed in the fluid, the shape of the object and the nature of the fluid.

Chapter 10: Sound

In Class 8 Science Chapter 10 we have to study about sound and its characteristics. We will know here about vibration and devices which produce vibrations. We can produce a different type of sound with the help of the vocal cord. All the sound produced by a human is just because of the vibration of vocal cords. Sound always requires a material medium to propagate. Different sounds can be identified by their loudness, shrillness, pitch, etc., properties. Eardrums help us to hear all type of sound. The characteristic of sounds can be known by its frequency, amplitude, wavelength, speed and time periods.

Chapter 11: Chemical Effects of Electric Current

In Class 8 Science Chapter 11 we will try to know about different terms related to electricity. A substance may be termed as a good conductor or bad conductor depending on whether the current can flow through it or not. When we cover a metallic substance with another using electrolysis, it is called electroplating. It is useful to prevent the metallic substance from corrosion also.

Chapter 12: Some Natural Phenomena

In Class 8 Science Chapter 12 deals the activates known as Natural Phenomena . We all have seen the lightning and heard the thundering during the rainy season. The chapter starts with the concepts of charging and the types of charges as negative and positive. When two charged objects come close to each other, the transfer of charges takes place. Using electroscope, we can check whether an object is charged or not. It also describes the strength of charge. We must know the dos and don’ts during the thunderstorms or earthquake .

Chapter 13: Light

In Class 8 Science Chapter 13 we will study about light, visibility of objects due to light and laws of reflection. During the study about light, we should know about Incident Ray, Reflected Ray, Normal at the point of incident. The first law of reflection states that angle of incidence is always equal to the angle of reflection. According to second law of reflection, the incident ray, the normal at the point of incidence and the reflected ray all lie in the same plane. Terms lateral inversion, dispersion, diffusion and regular reflection are also important for exams. Multiple image of an object due to multiple reflection can be seen in Kaleidoscope . At the end of the chapter, structure of eye, defects of eyes and Braille system of writing is given as important part of chapter 13 of Grade 8 Science.

Science is interconnected with other subjects like mathematics, technology, and engineering. A solid scientific foundation enhances students’ abilities in these related fields. Science ignites curiosity and wonder about the natural world. It encourages individuals to explore, question, and seek answers to the mysteries of the universe.

If you are facing any problem to understand the solution of any question, please specify through Discussion Forum section. Everything is given as separate PDF files. Assignments, Notes, Sample Papers, Chapter test and other study material will be uploaded very soon. Please give feedback and suggestions to improve the contents and quality if possible. We are updating the contents as per user’s suggestions.

In summary, studying science in school is crucial for equipping students with the knowledge, skills, and mindset needed to navigate a complex and rapidly changing world. It empowers them to make informed decisions, contribute to society, and engage in a lifelong journey of learning and discovery.

Understanding science is essential for informed citizenship. It enables individuals to assess the validity of scientific claims, make informed decisions on issues with scientific relevance (e.g., vaccines, climate policies), and engage in public discourse.

Important questions for exam will be uploaded for academic session 2024-25. If you need these questions of particular chapter urgently, please specify through “Contacts Us“, we will upload that chapter’s questions with in 24 hours. We are here to help you. We are trying to make online study more easier than ever. That is why, we have removed the login section from the website.

Science has played a pivotal role in shaping human history and culture. Studying the history of science provides insights into the evolution of human knowledge and how science has influenced society.

Class 8 Science NCERT solutions play a crucial role in the learning and understanding of scientific concepts for students in the 8th grade. Science NCERT solutions provide clear and comprehensive explanations of various scientific concepts covered in the curriculum. They help students understand complex topics in a structured manner. Class 8 is a crucial stage in building the foundation for more advanced scientific concepts that students will encounter in higher grades. Strong understanding at this stage prepares students for future learning.

Science helps us tackle global challenges such as food security, clean energy, and sustainable development. It offers solutions to pressing problems that affect societies worldwide. Science education opens up a wide range of career opportunities in fields like medicine, engineering, research, environmental science, and technology. It provides a strong foundation for future career choices.

How to Achieve 100 Marks in Class 8 Science

According to new rationalised NCERT books issued for academic session 2024-25, there are 13 chapters in Class 8 Science. Class 8 Science NCERT Solutions at Tiwari Academy are valuable resources for students preparing for their Class 8 Science exams. Most of the schools are selecting only 6 or 7 chapters for first terminal exams. So, if we plan properly we can score good marks easily in Class 8 Science subject. NCERT Solutions provide detailed explanations for each chapter and topic in the Class 8 Science textbook. They help students understand complex scientific concepts, theories, and principles. Here we are suggesting some good habits to score easily 100 in Grade 8 Science. Follow these steps and save your time, become tension free during the preparation of Science exams in standard 8.

Step 1: Be compatible with online and offline mode of study.

Step 2: follow the books issued for 2024-25 based on new syllabus., step 3: use 8th science ncert books and teacher’s help., step 4: avoid the chapters not in curriculum of 2024-25., step 5: complete the entire syllabus comfortably with guidance..

How many chapters are there in Class 8 Science?

According to new syllabus and ratioinalised NCERT books published for academic session 2024-25, there are all together 13 chapters in class 8 science. All the chapters are equally important and should done thoroughly. The chapters in first term or second term is decided by school only.

Which is the most important chapter in Class 8 Science?

Importance of all chapters are equal. Most of the chapters are foundation of class 10 Science. You may see the same chapters in Class 10 science also in more explained way.

Is NCERT Book sufficient to get good marks in standard 8 Science?

NCERT Books for Class 8 Science is designed beautifully for kids. It contains colorful diagrams and pictures and described in easy language. Everyone should strictly follow only NCERT Books.

Class 8 Science Exemplar Book all Chapters Chapter 1: Crop Production and Management Chapter 2: Microorganisms: Friend and Foe Chapter 3: Coal and Petroleum Chapter 4: Combustion and Flame Chapter 5: Conservation of Plants and Animals Chapter 6: Reproduction in Animals Chapter 7: Reaching the Age of Adolescence Chapter 8: Force and Pressure Chapter 9: Friction Chapter 10: Sound Chapter 11: Chemical Effects of Electric Current Chapter 12: Some Natural Phenomena Chapter 13: Light

8th Science NCERT Exemplar Chapter Wise Answers 1. Crop Production and Management 2. Microorganisms: Friend and Foe 3. Coal and Petroleum 4. Combustion and Flame 5. Conservation of Plants and Animals 6. Reproduction in Animals 7. Reaching the Age of Adolescence 8. Force and Pressure 9. Friction 10. Sound 11. Chemical Effects of Electric Current 12. Some Natural Phenomena 13. Light

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NCERT Solutions for Class 8 Science 2024 – Download PDF

Science is important for strengthening fundamental concepts in Class 8. Students need to have a thorough understanding of the chapters and their topics. But a lot of the time, students need help with a particular question or topic. In such times, having NCERT solutions is a lifesaver. NCERT Solutions for Class 8 Science helps students understand the fundamentals of Physics, Chemistry, and Biology. This will make Science exam preparation for Class 8 students easier and smoother.

In this article, we have provided the links to access the NCERT Solutions Class 8 Science. These NCERT solutions are designed by subject experts who have provided simple and understandable solutions to every problem. Students can find the answers to all the problems and questions in the NCERT textbook. To know more about NCERT Solutions for Class 8 Science, continue reading the article.

NCERT Solutions for Class 8 Science

NCERT Solutions for Class 8 Science is a comprehensive study material designed to help students understand the fundamental concepts of Science. It covers cell biology, force and pressure, and metals and non-metals. The solutions are presented step-by-step, making it easier for students to understand and learn the concepts.

With the help of NCERT Solutions for Class 8 Science, students can prepare for exams effectively and excel in their academic pursuits. By watching Embibe videos, students can reinforce their understanding of the concepts covered in the NCERT Solutions and enhance their learning experience.

Benefits of Referring to NCERT Solutions for Class 8 Science

The benefits of solving NCERT Solutions for Class 8 Science are:

• Offers In-depth Knowledge in Easy Language:  All NCERT solutions have been solved by top academic experts at Embibe. The Class 8 Science NCERT Solutions have been formed so that any student can understand them.
• Strictly Follows the CBSE Curriculum:  All Science Class 8 NCERT book questions have been solved step-by-step, taking care of the CBSE marking scheme.
• Cover all Fundamentals:  The solutions have been explained with the help of principles, laws, and concepts from the chapter. We provide a valid explanation of why this is the correct answer.
• Helpful for Competitive Examinations:  Solving these tricky questions requires in-depth knowledge and the strategy to arrive at the answer quickly. Solving these NCERT science solutions will help you learn to handle the questions in competitive examinations like JEE, NEET, and Olympiads.
• Help You Complete the Assignments on Time:  It will help you complete your assignments. However, you should try to solve the questions independently. If you need help understanding, refer to these 8th Science Solutions. To improve practice, students can also refer to  Class 8 science practice questions  on Embibe.

NCERT Solutions for Class 8 Science: Points to Remember

Having a few important points to refer to while preparing for Class 8 Science is always helpful. Given below are some points to remember for Class 8 Science that will help you have a detailed preparation:

• Agriculture is a branch of Science dealing with the cultivation or growing of plants and raising animals that are useful to us in the field.
• Microbes are of five major kinds — bacteria, fungi, algae, protozoa and viruses.
• Synthetic plastic materials are obtained by gentle heating and moulding, such that the moulded materials cannot be reshaped by gentle heating.
• A substance which cannot be broken into two or more different substances by any physical or chemical means is called an element.
• Heating a complex organic substance without air so that it breaks up into simpler volatile fractions is called destructive distillation.
• The materials such as wood, coal, coke, hydrogen, petroleum gas, compressed natural gas, alcohol and ether are combustible materials.

Access NCERT Class 8 Science Chapter-wise Solutions

You can find  NCERT  Science Class 8 Solutions for all chapters at Embibe. We have provided solutions for all chapters from Chapters 1 to 18.

FAQs on NCERT Solutions for Class 8 Science

Given below are some frequently asked questions on NCERT Class 8 Science solutions:

Ans : We suggest that every student try to solve the questions first, and if they fail to do so then only they should refer to the solutions.

Ans: Referring to Science Class 8 NCERT Solutions will help you in the final exam. But apart from solving the NCERT Questions, one must also solve the previous year’s question papers, complete the assignments given by the teacher and take some online mock tests as it will help them to overcome stress during the final exam.

Ans : Students can find NCERT Class 8 practice questions on Embibe.

Ans : Students can access the NCERT Class 8 Science Solutions for on Embibe.

Ans : Yes, the NCERT Guide for Class 8 Science has been framed according to the CBSE Guidelines.

We hope this article on NCERT Class 8 Science solutions was helpful to you. For more information, stay tuned on Embibe .

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Assignments For Class 8 Science

Solve these Science Assignment for Class 8 PDF with answers. These Science Assignment for Class 8 PDF are prepared by our expert teachers according to the latest syllabus of the CBSE Board Exam. We have provided you CBSE Science Assignment for Class 8 PDF with answers to help students to make their preparation better.

Assignments for Class 8 Science have been developed for Standard 8 students based on the latest syllabus and textbooks applicable in CBSE, NCERT and KVS schools. Parents and students can download the full collection of class assignments for class 8 Science from our website as we have provided all topic wise assignments free in PDF format which can be downloaded easily. Students are recommended to do these assignments daily by taking printouts and going through the questions and answers for Grade 8 Science. You should try to do these test assignments on a daily basis so that you are able to understand the concepts and details of each chapter in your Science book and get good marks in class 8 exams.

Free PDF of CBSE Class 8 Science assignments PDF with Answers prepared by our expert from the latest edition of NCERT books. By practicing these Class 8 assignment will help in scoring more marks in your Examinations

Students can also download NCERT Solution free PDF for all subjects to prepare for their upcoming exams. You can also download NCERT Solutions for Class 8 Maths to help you to make your preparation better and score more marks in your examinations.

And more importantly, students have to follow through the assignments after completing their syllabus. So.start working on CBSE Class 8 Science assignment PDF will be a great help to get good marks in the examination.

Assignments for Class 8 Science as per CBSE NCERT pattern

All students studying in Grade 8 Science should download the assignments provided here and use them for their daily routine practice. This will help them to get better grades in Science exam for standard 8. We have made sure that all topics given in your textbook for Science which is suggested in Class 8 have been covered ad we have made assignments and test papers for all topics which your teacher has been teaching in your class. All chapter wise assignments have been made by our teachers after full research of each important topic in the textbooks so that you have enough questions and their solutions to help them practice so that they are able to get full practice and understanding of all important topics. Our teachers at https://www.assignmentsbag.com have made sure that all test papers have been designed as per CBSE, NCERT and KVS syllabus and examination pattern. These question banks have been recommended in various schools and have supported many students to practice and further enhance their scores in school and have also assisted them to appear in other school level tests and examinations. Its easy to take print of thee assignments as all are available in PDF format.

Some advantages of Free Assignments for Class 8 Science

• Solving Assignments for Science Class 8 helps to further enhance understanding of the topics given in your text book which will help you to get better marks
• By solving one assignments given in your class by Science teacher for class 8 will help you to keep in touch with the topic thus reducing dependence on last minute studies
• You will be able to understand the type of questions which are expected in your Science class test
• You will be able to revise all topics given in the ebook for Class 8 Science as all questions have been provided in the question banks
• NCERT Class 8 Science Workbooks will surely help you to make your concepts stronger and better than anyone else in your class.
• Parents will be able to take print out of the assignments and give to their child easily.

All free Printable practice assignments are in PDF single lick download format and have been prepared by Class 8 Science teachers after full study of all topics which have been given in each chapter so that the students are able to take complete benefit from the worksheets. The Chapter wise question bank and revision assignments can be accessed free and anywhere. Go ahead and click on the links above to download free CBSE Science Assignment for Class 8 pdf.

Free PDF download of Class 8 Science assignment pdf with answers created by master educators from the latest syllabus of CBSE Boards. By practicing these Class 8 Science assignments will help you to score more marks in your CBSE Board Examinations. We also give free NCERT Solutions and other study materials for students to make their preparation better.

Students who are searching for better solutions can download the Class 8 Science Assignment pdf with answers to assist you with revising the whole syllabus and score higher marks in your exam.

These Class 8 Science assignment pdf with answers pdf shows up with an answer key with step-by-step answers for students to comprehend the problem at each level and ​not retain it.

Since you are given all the essential data with respect to the 8th Standard Science Assignment and we trust this definite article is useful. So Students who are planning for the Exam should have to have better-solving skills. What’s more, to have these skills, one should rehearse enough of the 8th Standard Science Assignment. Also, most importantly, students should have to finish the assignments after completing their syllabus. Dealing with the 8th Standard Science Assignment will be more helpful to get good marks in the exam. So begin your preparation on Science Assignment for Class 8 pdf to score higher marks.

We hope this Science Assignment for Class 8 PDF with answers shared with you will help you to score good marks in your exam. We have also other study material like NCERT Solutions, NCERT Book, Exam Question, and simpler paper of Class 8. If You want to score higher in your exam, So practice all this study material and if you have any problem then, write it in the comment box and we will guide you as much as possible.

You can download free assignments for class 8 Science from https://www.assignmentsbag.com

You can get free PDF downloadable assignments for Grade 8 Science from our website which has been developed by teachers after doing extensive research in each topic.

On our website we have provided assignments for all subjects in Grade 8, all topic wise test sheets have been provided in a logical manner so that you can scroll through the topics and download the worksheet that you want.

You can easily get question banks, topic wise notes and questions and other useful study material from https://www.assignmentsbag.com without any charge

Yes all test papers for Science Class 8 are available for free, no charge has been put so that the students can benefit from it. And offcourse all is available for download in PDF format and with a single click you can download all assignments.

https://www.assignmentsbag.com is the best portal to download all assignments for all classes without any charges.

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NCERT Books

NCERT Books for Class 8 Science PDF Download

NCERT Books Class 8 Science : The National Council of Educational Research and Training (NCERT) publishes Science textbooks for Class 8. The NCERT Class 8th Science textbooks are well known for it’s updated and thoroughly revised syllabus. The NCERT Science Books are based on the latest exam pattern and CBSE syllabus.

NCERT keeps on updating the Science books with the help of the latest question papers of each year. The Class 8 Science books of NCERT are very well known for its presentation. The use of NCERT Books Class 8 Science is not only suitable for studying the regular syllabus of various boards but it can also be useful for the candidates appearing for various competitive exams, Engineering Entrance Exams, and Olympiads.

NCERT Class 8 Science Books in English PDF Download

NCERT Class 8 Science Books are provided in PDF form so that students can access it at any time anywhere. Class 8 NCERT Science Books are created by the best professors who are experts in Science and have good knowledge in the subject.

NCERT Books for Class 8 Science – English Medium

The NCERT Science book is a single book and not divided into parts. The book is available in all English, Hindi & Urdu Medium. Students can click on the respective link to download the NCERT Class 8 book.

• Chapter 1:  Crop Production and Management

NCERT Solutions for class 8 Science

• Chapter 2:  Microorganisms: Friend and Foe
• Chapter 3:  Synthetic Fibres and Plastics
• Chapter 4:  Materials: Metals and Non-Metals
• Chapter 5:  Coal and Petroleum
• Chapter 6:  Combustion and Flame
• Chapter 7:  Conservation of Plants and Animals
• Chapter 8:  Cell – Structure and Functions
• Chapter 9:  Reproduction in Animals
• Chapter 10:  Reaching the Age of Adolescence
• Chapter 11:  Force and Pressure
• Chapter 12:  Friction
• Chapter 13:  Sound
• Chapter 14:  Chemical Effects of Electric Current
• Chapter 15:  Some Natural Phenomena
• Chapter 16:  Light
• Chapter 17:  Stars and The Solar System
• Chapter 18:  Pollution of Air and Water

NCERT Books for Class 8 Science – Hindi Medium

• अध्याय 1:  फसल उत्पादन एवं प्रबंध
• अध्याय 2:  सूक्ष्मजीव: मित्र एवं शत्रु
• अध्याय 3:  संश्लेषित रेशे और प्लास्टिक
• अध्याय 4:  पदार्थ: धातु और अधातु
• अध्याय 5:  कोयला और पेट्रोलियम
• अध्याय 6:  दहन और ज्वाला
• अध्याय 7:  पौधे एवं जंतुओं का संरक्षण
• अध्याय 8:  कोशिका – संरचना एवं प्रकार्य
• अध्याय 9:  जंतुओं में जनन
• अध्याय 10:  किशोरावस्था की ओर
• अध्याय 11:  बल तथा दाब
• अध्याय 12:  घर्षण
• अध्याय 13:  ध्वनि
• अध्याय 14:  विधुत धारा के रासानिक प्रभाव
• अध्याय 15:  कुछ प्राकृतिक परिघटनाएँ
• अध्याय 16:  प्रकाश
• अध्याय 17:  तारे एवं सौर परिवार
• अध्याय 18:  वायु तथा जल का प्रदूषण

The NCERT syllabus mainly focuses on this book to make it student-friendly to make it useful for both the students and the competitive exam aspirants. The book covers a detailed Science based on the syllabuses of various boards. NCERT Science Books for Class 8 is perfectly compatible with almost every Indian education state and central boards.

We hope that this detailed article on NCERT Books Class 8 Science helps you in your preparation and you crack the Class 8 exams or competitive exams with excellent scores.

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NCERT Solutions For Class 8 - 2024-25

• NCERT Solutions

Class 8 NCERT Solutions - FREE PDF Download

NCERT Solutions for Class 8 is important study material prepared to help students understand concepts taught in their textbooks. These solutions provide step-by-step explanations and answers to all questions in Class 8 NCERT textbooks, covering subjects like Mathematics, Science, Social Science, and English. NCERT Solutions Class 8, prepared by subject experts following the CBSE syllabus, ensures clarity in learning. 

NCERT Solution Class 8 help students grasp complex topics, improve problem-solving skills, and prepare effectively for exams. NCERT Solutions is prepared to support self-learning. They encourage students to explore each subject comprehensively and build a strong foundation for future academic success. Class 8 Question Answers offer an effective method for students to enhance their understanding and confidence in various subjects.

Subject wise NCERT Solutions for Class 8

Mentioned below in the table is the link to subject-wise NCERT solutions for Class 8. The NCERT solutions for Maths, English, Hindi, Science and Social Science are included in the table.

NCERT Solutions for Class 8: Subject-wise Details

Ncert solutions for class 8 maths.

NCERT Solutions For Class 8 Maths is an important study material that helps students understand and excel in mathematics. These solutions offer clear explanations and step-by-step answers to questions in NCERT textbooks. Using NCERT Solutions for Class 8 Maths, students can enhance their problem-solving skills, grasp mathematical concepts, and prepare thoroughly for exams. 

These solutions not only help with homework and practice but also help with revising key topics during examination. All NCERT Solutions for Class 8 Maths in Hindi and English medium are prepared by Master Teachers and are explained clearly and simply, following the latest CBSE Syllabus. NCERT Solutions for Class 8 Maths ensures students build a strong foundation in mathematics.

NCERT Solutions for Class 8 Science

NCERT Solutions For Class 8 Science provides clear and detailed answers to the questions in the NCERT Science textbook, covering all chapters thoroughly. These solutions are prepared by our Master Teachers by following the latest CBSE Syllabus. Using these solutions, students can understand complex scientific concepts, improve their problem-solving skills, and prepare effectively for exams. The NCERT Solutions for Class 8 Science in Hindi and English medium are highly useful for students with difficulty understanding the concepts. It helps cover important topics like cell structure, chemical reactions, or force and pressure, making learning easier and more enjoyable. They help students build a strong foundation in science, making it easier to solve more advanced topics in higher classes. These solutions help students with homework, revision, and exam preparation.

NCERT Solutions Class 8 Social Science

NCERT Solutions for Class 8 Social Science is prepared to help students understand the key concepts and topics in their textbooks. These solutions provide detailed explanations for each chapter, making it easier for students to grasp complex ideas. They cover all subjects under Social Science, including History, Geography, and Civics. The solutions are written in simple language, making them easy for all students. Using these resources, students can improve their comprehension, enhance their exam preparation, and build a strong foundation for higher studies.

NCERT Solutions Class 8 SST Chapter-Wise Book Links

NCERT Solutions for Class 8 English

NCERT Solutions for Class 8 English provide comprehensive answers and explanations for all the questions in the NCERT textbook. These solutions are prepared to help students understand the lessons better and improve their language skills. Each chapter is covered in detail, making it easier for students to grasp complex concepts and themes. The solutions include summaries, important points, and exercises enhancing comprehension and writing abilities. Using these solutions, students can prepare effectively for exams, complete their homework, and develop a strong foundation in English.

Links for NCERT Solutions for Class 8 English Coursebooks

NCERT Hindi Class 8 Solutions

NCERT Hindi Class 8 Solutions is an important material for students studying in the 8th grade. These solutions provide clear and detailed answers to all the questions in the NCERT Hindi textbook. They are prepared to make learning easier and help students understand the concepts better. The solutions cover grammar, prose, poetry, and writing sections, offering comprehensive guidance. Using these solutions, students can prepare well for their exams, do their homework accurately, and improve their Hindi language skills. The solutions cover all chapters and exercises, offering step-by-step explanations. This makes it simpler for students to follow along and grasp the material, ensuring a solid foundation in Hindi.

NCERT Solutions Class 8 Hindi Book Links

NCERT Class 8 Subjects - Marks Weightage

Apart from having the best Class 8th NCERT solutions, knowing the marks Weightage well is necessary, as it helps a lot in the preparations. Every subject carries a total of 100 marks in Class 8, and in that, 20 marks are for internal assessment and 80 for the final examinations.

When to Refer NCERT Solutions for Class 8?

When preparing for Class 8 exams, referring to NCERT Solutions at the right time is important to maximise their benefits. Here are some steps on when and how to use them:

Begin your preparation by thoroughly studying your textbooks.

Make sure you fully understand each chapter before moving on to the next.

Test your understanding by solving exercises without looking at the answers.

After solving a problem, check your answers to find any mistakes.

If you find mistakes, try to correct them using the provided steps.

Once you are comfortable with the chapter, start solving the NCERT textbook questions.

Try solving these questions on your own without referring to the solutions first.

After attempting, compare your answers with the solutions provided.

Correct mistakes if you make mistakes using the NCERT Solutions steps.

Keep practising the NCERT textbook questions until you can answer all of them correctly.

Repeat this process for each chapter to ensure a clear and thorough understanding.

How Can Class 8 NCERT Solutions Help in Exam Preparation?

NCERT Class 8 Question Answers are very helpful for exam preparation. These solutions cover all the important topics and are prepared according to the CBSE syllabus. They simply explain each chapter, making it easier for students to understand and remember. Using these solutions can increase your chances of doing well in exams. Here are some ways NCERT Solutions helps in exam preparation:

Practising many questions from each chapter improves your understanding.

They help clear any doubt and enhance your knowledge.

These solutions help identify your strengths and weaknesses.

Focusing on weak areas is crucial for doing well in exams.

Many questions in exams come from these exercise problems.

Thoroughly studying the solutions for each chapter helps you score well in the subjects.

Other Important NCERT Resources for Class 8

In addition to using NCERT Class 8 solutions, students should use other study materials like NCERT Exemplar, NCERT textbooks, and Revision Notes. These resources are aligned with the CBSE Class 8 syllabus and help students prepare for exams. After finishing the course, students can use these study materials for quick reviews before exams. We've included links to more NCERT resources for Class 8 to help you study effectively for the exams.

FAQs on NCERT Solutions For Class 8 - 2024-25

1. Why is NCERT solutions Class 8 Pdf important?

Having NCERT solution of Class 8 in pdf format is very useful for the students to learn well and get the best preparation. The pdf format of the solution ensures that they can be easily downloaded anytime and anywhere, and can be easily accessed on any device. These pdf formats of the solutions also contain questions and problem statements. It ensures that the students do not need to carry the entire books everywhere. Students can secure good marks referring to them.

2. What are the advantages of having the Class 8 NCERT solution?

There are many advantages of having an NCERT solution for class 8, like:

These solutions are designed by the experts, making sure that the students get a proper understanding of them.

Having the NCERT solutions ensures that the students will not face any hurdles while preparing.

Having the NCERT solutions also makes sure that the students will get the best preparation materials and will not lag anywhere.

These solution materials also contain the explanation of the chapters, making it easier for the students to understand every concept.

In the solution pdfs, the important questions are also marked, and examples of every solution are also stated.

3. What should I do to get a good percentage in Class 8 exams? 

If you are a Class 8 student and wish to get a good percentage in exams then follow the tips given below. 

You must start preparing for the exams at an early stage right from the starting of your academic session. Doing so will enable you to complete your course on time so that you can invest your extra time in revision. 

Try to attend your school daily. 

Revise all subjects and their respective chapters at your home. 

Practice the textbook questions along with the NCERT Solutions of Class 8 to grasp the concepts. 

4. How can I make a study plan for Class 8? 

The steps for making a good study plan for Class 8 are- 

First, you should begin with knowing the faults in your current timetable. You have to rearrange your timetable and do those activities first that are important. For instance, preparing for class tests, home assignments, etc. 

Know when you like to study. Whether you like studying early in the morning or at night.  Just know the time and start studying. 

Be sure to take small breaks every 1-2 hours of studying. You can take a 5 to 10 minutes break and then resume. 

Try to give at least one hour to every subject for revising concepts. However, you can increase or decrease the time duration as per your preference and preparation. 

5. How can I download the NCERT Solutions of Class 8 for different subjects? 

Ans: Here are the steps to download the NCERT Solutions of Class 8 for different subjects. 

There will be a download link for each subject and chapter in this page.

Click on the link.

You will see a download PDF option on that page. 

Click on it to download offline for free.

6. Are subjects of Class 8 easy or difficult? 

Well, the answer to this question depends on the calibre of the student. Some students may find this class easy to clear as they are good at academics. At the same time, there are some students too, who will find this class tough as they are not good in their studies. Such students are recommended to begin with their studies at an early phase so that they can complete their syllabus on time along with understanding the concepts thoroughly. Moreover, they can refer to the NCERT Solutions for all subjects and the chapters for better comprehension. All the study material is available on the Vedantu app and the website. 

7. Why is Vedantu considered the best online learning platform to study for Class 8? 

Vedantu is considered the best online learning platform to study Class 8 due to the following reasons-

It provides different types of study materials including the NCERT Solutions of the chapters, revision notes, important questions, sample question papers, etc., so that the students can learn and understand the concepts clearly. 

These study materials are prepared by professionals who have years of experience in the field of teaching. 

The content in these study materials is easy to comprehend. 

They offer the facility of video tutorials for efficient learning. 

8. Are NCERT Solutions for Class 8 sufficient for exam preparation?

NCERT Solutions for Class 8 covers the entire syllabus according to CBSE guidelines. By solving these solutions, students can perform well in exams as they align closely with the exam pattern.

9. How should I use NCERT Solutions for Class 8 effectively?

Students should read the textbook chapters thoroughly and then use NCERT Solutions to solve the questions provided. Regular practice and understanding of these solutions can help in achieving better marks.

10. Can I use any additional resources along with NCERT Solutions for Class 8?

Students can refer to Vedantu’s NCERT Exemplar problems, additional reference books, practice papers, and sample question papers to further enhance their understanding and preparation.

CBSE Class 8 Study Materials

Scholarships

Test Series NEW

• 1.0 CBSE Class 8 Science

Physics, Chemistry, and Biology are three cornerstone subjects in CBSE's 8th-class science curriculum that are very important for the scientific learning process. The curriculum for the 8th class is aimed at sharpening students' understanding of fundamental concepts in science and/or igniting in students the insatiable thirst for curiosity about their environment.

The course contains elements related to physics, chemistry, and biology. Foundational concepts are taught in each of these areas that will be quite useful for future science classes. 

This blog will cover topics related to CBSE Class 8 Science, such as the class syllabus, important books, and more, which students must know to score well in Class 8 Science.

• 2.0 CBSE Class 8 Science Syllabus

The CBSE Class 8 syllabus aims to provide students with a profound understanding of mathematical concepts and instil critical thinking skills in them. Instead of focusing on students mastering pre-existing algorithms, the syllabus tries to teach them to understand the basic principles of mathematics. The aim is to make them enjoy the subject and to get them to develop their strategies for solving and posing problems. Mastering the Class 8 Maths syllabus is not solely about being ready for exams. Instead, it is a foundation for excelling in board examinations and developing a solid mathematical mindset. Here's a detailed overview of the CBSE Class 8 Maths syllabus:

The CBSE Class 8 Science syllabus is designed to provide a comprehensive understanding of fundamental scientific concepts across Physics, Chemistry, and Biology. Here is a breakdown of the syllabus:

• 3.0 CBSE Class 8 Science Books

The CBSE Class 8 Science books are carefully designed based on the syllabus and help students understand science thoroughly. Moreover, these books include all the essential chapters of Physics, Chemistry, and Biology, with lucid and comprehensive explanations that facilitate students' understanding of key ideas. Focusing on these core subjects aims to develop students' critical thinking abilities, analytical skills, and a strong base in the concepts of science to help them learn in subsequent levels.

1. NCERT Textbook for Class 8 Science

CBSE Class 8 Science books in the curriculum have been specially prepared to support students in developing a good understanding of science. It covers all the important topics of Physics, Chemistry, and Biology while providing clear explanations and interesting content that support students in understanding the core concepts of each discipline. By focusing on the disciplines of these subjects, the books aim to enhance the students' ability to think critically, and analytically, and to help them build a solid foundation in science to prepare them for the sciences in upper grades.

2. Additional Reference Books

These books enhance the academic experience for students, by giving a range of questions, particularly advanced-level questions, that encourage students to utilize concepts and deepen their understanding of the course materials. Here are some additional reference resources students can practice with: 

• Lakhmir Singh
• 4.0 CBSE Class 8 Science Mock Tests

CBSE Class 8 Science mock tests are customized to fit each student's strengths and weaknesses and are the most effective way to measure exam preparedness in the subjects. After each mock test, students can learn from their mistakes, work on them, and avoid repeating the same mistakes in the final exam.

Mock tests that are followed by the practice encouraged students to develop time management skills which were applied during the real exam. By getting mock tests regularly, you will be able to follow up on your improvement and keep improving at all times. Improve your performance with ALLEN’s Mock Test designed by by some of India's top expert faculties.

• 5.0 CBSE Class 8 Science Preparation Tips

1. Understanding the Syllabus: Before diving into your studies, it is critical to gain full knowledge of the entire curriculum to avoid overlooking any topics. When you have understood what is required, the best plan is to divide the syllabus into smaller manageable parts. In this way, on the one hand, you can pay attention to the section at a time; on the other hand, you can organize better your study sessions, set realistic goals, and be sure that all topics are covered.

2. Regular revision: To keep information in your mind and make it solid, you need to revise it periodically. Another way is to test yourself on a topic without using the book or notes. Memory is enhanced through this active recall exercise, and areas that require more attention are identified. On top of that, flashcards can be used for reviewing the main ideas, definitions and terms in the course work. By constantly going through these flashcards, one might be able to easily remember what was contained in them keeping the information fresh in one’s mind hence making it easier to retrieve during exams.

3. Practice Regularly: If you want to excel in your examinations, regular practice is very essential. One of the strategies is executing mock tests, this can be an evaluation of personal preparation; hence, one can see where some improvements may be needed. When practising, focus on finishing the questions within the time frame to improve your speed and accuracy. 

4. Ask for Doubts: If you are having any doubts or questions while studying, never hesitate to ask for help. Ask your teacher or classmates who can help you understand the problem topics. Learning among one another's classmates helps because the discussion of the concepts confers understanding over and over again, with new insights.

5. Stay Healthy and Focused: Among the most important prerequisites for studying well are health and focus. Therefore, one should get adequate sleep at night to help the mind remain alert and the focus sharp. Wholesome nutrition will help retain one's energy levels throughout the day so that one may focus easily while studying. Breaking up your study sessions by taking small breaks is equally important. 

Table of Contents

The CBSE Class 8 Science Examination comprises multiple-choice questions, short-answer questions, and long-answer questions. The paper assesses the students' conceptual knowledge and parameters like knowledge application and problem-solving.

Practical work in science forms an intrinsic part, this enables students to put theoretical knowledge into practice, develop scientific inquiry skills, and gain hands-on experience with experiments. Practical activities deepen understanding and enhance problem-solving ability.

In solving numerical problems in Class 8 Science, you should start by carefully reading the problem and identifying the key information given in the problem. Note down the relevant formulae and solve the problem in a stepwise manner, showing all your steps.

NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12

NCERT Solutions for Class 8 Science Chapter 16 Light

October 4, 2019 by Sastry CBSE

Topics and Sub Topics in Class 8 Science Chapter 16 Light:

Light Class 8 Science NCERT Textbook Questions

Question 1. Suppose you are in a dark room. Can you see objects in the room? Can you see objects out¬side the room? Explain. Answer: When we are in a dark room then we cannot see objects in the room. We can see the objects outside the room, because out of the room the light is available and the rays of light can enter our eyes after reflection from the objects.

Question 2. Differentiate between regular and diffused reflection. Does diffused reflection mean the failure of the laws of reflection? Answer:

No, diffuse reflection doesn’t mean the failure of laws of reflection.

Question 3. Mention against each of the following whether regular or diffused reflection will take place when a beam of light strikes. Justify your answer in each case.

• Polished wooden table
• Chalk powder
• Cardboard surface
• Marble floor with water spread over it
• Piece of paper
• Regular reflection will take place because the surface is plane and polished.
• Diffused reflection will take place because the surface is rough.
• Regular reflection will take place because the surface is smooth and plane.

Question 4. State the laws of reflection. Answer: The laws of reflections are:

• The incident ray, the normal and the reflected ray, all lie in the same plane.
• The angle of incidence is equal to the angle of reflection.

Question 6. Fill in the blanks in the following. (a) A person 1 m in front of a plane mirror seems to be ______ m away from his image. (b) If you touch your ______ ear with a right hand in front of a plane mirror it will be seen in the mirror that your right ear is touched with _____ (c) The size of the pupil becomes _______ when you see in dim light. (d) Night birds have _______ cones than rods in their eyes. Answer: (a) 2 (b) left, left hand (c) larger (d) lesser

Choose the correct option in Questions 7-8. Question 7. The angle of incidence is equal to the angle of reflection (a) Always (b) Sometimes (c) Under special conditions (d) Never Answer: (a) Always

Question 8. Image formed by a plane mirror is: (a) virtual, behind the mirror and enlarged. (b) virtual, behind the mirror and of the same size as the object. (c) real at the surface of the mirror and enlarged. (d) real, behind the mirror and of the same size as the object. Answer: (b) virtual, behind the mirror and of the same size as the object.

Question 11. Gurmit wanted to perform Activity 16.8 using a laser torch. Her teacher advised her not to do so. Can you explain the basis of the teacher’s advise? Answer: Teacher has advised Gurmit not to do so because laser light is very harmful for her eyes and can cause a permanent defect in the eye. Person can even lose his or her eyesight if laser torch is directed over the eyes.

Question 12. Explain how you can take care of your eyes. Answer: Eyes are very precious. We must take proper care of them. We must

• always sit straight while reading or writing.
• if advised, use suitable spectacles.
• wash our eyes with clean water frequently.
• not look at the sun directly.
• always read or write in a proper light.

Question 13. What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray? Answer: Here, the angle of reflection is 90°. As we know, according to the laws of reflection that angle of incidence is equal to angle of reflection. Here, the angle between the incident ray and reflected ray is 90°. i.e., ∠i + ∠r = 90° Since, ∠i = ∠r We can write, ∠i + ∠i = 90° ⇒ 2∠i = 90° ⇒ ∠i = 45° Angle of incidence = 45°.

Question 14. How many images of a candle will be formed if it is placed between two parallel plane mir¬rors separated by 40 cm? Answer: Here, mirrors are placed parallel to each other 40 cm apart. Therefore, the infinite number of images will be formed.

Light Class 8 Science NCERT Intext Activities Solved

Activity 8 (NCERT Textbook, page 206) Look into your friend’s eye. Observe the size of the pupil.Throw light on her eye with a torch. Observe the pupil now. Switch off the torch, and observe her pupil once again. Do you notice any change in the size of the pupil? In which case was the pupil larger? Why do you think it was so? In which case do you need to allow more light in the eye, when the light is dim or bright? Solution: When the light from the torch falls on the pupil, its size becomes smaller to allow less amount of light to enter into the retina. When light is switched off, pupil enlarges to allow more light to enter into the retina. Thus, pupil controls the amount of light entering into the eye.

NCERT Solutions for Class 8 Science Chapter 16 – 1 Mark Questions and Answers

Question 1. Define dispersion of light. [MSE (Chandigarh) 2007] Answer: Splitting up of white light into seven colours when it passes through a glass prism is known as dispersion of light.

Question 2. Name the colours in the order they appear in the spectrum of light. [MSE (Chandigarh) 2005] Answer: VIBGYOR – Violet, Indigo, Blue, Green, Yellow, Orange and Red.

Question 3. Angle of incidence is equal to the angle of reflection. [NCERT]

• Under special conditions

Answer: Always.

Question 4. Image formed by a plane mirror is [NCERT]

• virtual, behind the mirror and enlarged.
• virtual, behind the mirror and of the same size as the object.
• real at the surface of the mirror and enlarged.
• real, behind the mirror and of the same size as the object.

Answer: virtual, behind the mirror and of the same size as the object.

Question 5. What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray ? [NCERT] Answer: The angle of incidence = 45°.

Question 6. What are the two factors responsible for an object to be seen ? Answer: To be seen an object, the sense of vision and light are required.

Question 7. What is meant by normal ? Answer: The perpendicular drawn at the point of incidence is known as normal.

Question 8. Define the angle of incidence. Answer: The angle between the incident ray and the normal is known as angle of incidence.

Question 9. What name is given to the angle between the normal and the reflected ray ? Answer: Angle of reflection.

Question 10. What is meant by lateral inversion ? [NCT2010] Answer: Lateral inversion is the phenomenon of the interchange of the left and right sides, between the object and its image.

Question 11. When the reflected rays are parallel, what type of reflection is taking place ? Answer: Regular reflection.

Question 12. In irregular reflection, are the reflected rays parallel or not ? Answer: In irregular reflection the reflected rays are not parallel.

Question 13. What are illuminated objects ? Answer: Objects which reflect the light falling on them and can be seen are known as illuminated objects

Question 14. What is white light ? Answer: Sunlight is a mixture of seven colours also known as white light.

Question 15. Give one example of natural dispersion. Answer: Formation of rainbow.

Question 16. What is function of iris ? Answer: Iris controls the amount of light entering into the eyes.

Question 17. What is meant by visually challenged people ? Answer: Visually challenged people have limited vision to see things.

Question 18. What are non-optical aids ? Answer: Non-optical aids include visual aids, tactual aids, auditory aids and electronic aids

Question 19. What are tactual aids ? Answer: Tactual aids include Braille writer, slate and stylus. They help the visually challenged persons in taking notes, reading and writing and in learning mathematics.

Question 20. Fill in the blanks :

• The angle of reflection is ………… to the angle of incidence.
• The image formed by a plane mirror is ………….. inverted with respect to the object.
• The …………….. uses two plane mirror strips each of which is kept inclined at 45° to the axis of the tube.

Question 21. Write one/two-word answer for each of the following :

• The ray of light that bounces back from a plane mirror.
• The nature of the image formed by a plane mirror.
• The number of images formed by a pair of parallel plane mirrors.
• A devices that is often used as “looking glass”.
• Reflected ray
• Virtual image
• Multiple images

NCERT Solutions for Class 8 Science Chapter 16 – 2 Mark Questions and Answers

Question 1. Which kind of spherical mirrors are used in vehicles ? Why ? [NCT 2007] Answer: A convex mirror is used in vehicles because it gives the driver a large field of view.

Question 2. Why is it important to take care of our eyes ? Mention any two activities that may cause damage to our eyes. [KVS 2005] Answer: Eyes are the most wonderful gift of nature to us and they must serve us for whole life. Our eyes can be damaged by playing carelessly or by hurting them with sharp projections

Question 3. Suppose you are in a dark room. Can you see object in the room ? Can you see objects outside the room ? Explain. [NCERT] Answer: The objects cannot be seen inside the room because there is no light. The objects outside the room can only be seen if there is light outide.

Question 4. State the laws of reflection. [NCT 2011, NCERT] Answer: Laws of reflection:

• The incident ray, the reflected ray and the normal at the point of incidence lie in the same plane.
• The angle of incidence is equal to the angle of reflection

Question 5. Distinguish between real and virtual image. Answer: Differences:

Question 6. What is the function of the eyelids ? Answer:

• Eyelids prevents the objects from entering the eye.
• They also shut out light when not required.

Question 7. Give some uses of plane mirror. Answer: Plane mirrors are used for dressing up, shaving beards, in scientific metres and for designing periscope.

Question 8. How many plane mirror strips do we use in a kaleidoscope. At what angle are they inclined with respect to each other ? Answer: The kaleidoscope uses a set of three equal size plane mirror strips. The three strips are inclined to each other at angles of 60° each.

Question 9. Why do we say that the image formed in a plane mirror is “virtual” ? Answer: The image formed in a plane mirror cannot be obtained on a screen. So we, say it is a ‘virtual’ image.

Question 11. How many images are formed when two mirrors are placed edge to edge

• at right angles of each other.
• at an angle of 60° to each other ?
• Three images will be formed.
• Five images will be formed.

Question 12.

• How are multiple iiriages formed ?
• Name a device based on this principle ?
• When three rectangular strips of plane mirror are kept edge to edge at an angle of 60° to each other, multiple images are formed.
• Kaleidoscope is based on this principle.

Question 13. What is colour blindness ? Give reason for this defect ? Answer: Some people cannot distinguish between the different colours. This is known as colour blindness. Colour blindness is due to the absence of cones on the nerve endings on the retina.

Question 14. What is a nictating membrane ? In which animal is it found ? Answer: Nictating membrane is a transparent membrane over the eye to protect the eye from water. Fish and frogs have a nictating membrane.

Question 15. What kind of eyes do the insects have ? Answer: Eye in insects is a compound eye with hundreds of small units, each with a lens of its own. The image seen by a insect is a blured picture.

Question 16. Why should children take milk and eat carrots ? Answer: Milk, carrots and yellow fruits are rich in vitamin A, which is very essential for the eyes to maintain good vision.

Question 17. How is night blindness caused ? Answer: Night blindness is caused by the deficiency of vitamin A and damage to the retina and the rods.

Question 18. Distinguish between luminous and non-luminous bodies. Answer: Please refer to important points and definitions 21 and 22.

Question 19. Is the moon a luminous body ? How are we able to see the moon ? Answer: The moon is non-luminous. We are able to see the moon because it reflects the sunlight falling on it.

NCERT Solutions for Class 8 Science Chapter 16 – 3 Mark Questions and Answers

Question 2. What are cones and rods ? What are their functions ? Answer: Cones are the nerve endings which are sensitive to colour light. They help us to distinguish between colours. Rods are the nerve endings which are sensitive to bright light.

Question 3.

• In a periscope two mirrors are arranged parallel to each other but they do not form multiple images. Why ?
• What is the use of periscope ?
• In a periscope two mirrors are placed parallel and facing each other but are in an inclined position at an angle of 45°. So they do not form multiple images.
• in submarines to view the happening on the surface of water.
• to view objects behind the wall.

Question 5.

• What is spectrum ?
• What is the meaning of VIBGYOR ?
• Spectrum is the band of seven colours obtained on the screen when white light splits on passing through a prism.
• VIBGYOR represents the seven colours of the spectrum, i.e. violet, indigo, blue, green, yellow, orange and red.

Question 6. How is a rainbow formed ? Answer: The water droplets suspended in the air after the rain act as prisms. When the sun is towards the horizon the inclined rays pass through the water drops to disperse into the seven colours of the specturm.

Question 7. Why does white light disperse when it passes through a glass prism ? Answer: White light is a combination of seven colours of light. The speed of each colour is different. So, while passing through the glass prism each colour deviates by different amounts. Therefore, despersion of light into a spectrum takes place.

Question 8.

• Which part of the human eye makes a person ‘blue eyed’ ?
• What role is played by ciliary muscles ?
• What is the importance of retina in the eye ?
• Iris is responsible for making the person blue eyed.
• Ciliary muslces help to adjust the focal length of the lens to view all objects clearly.
• The image of the object is formed on the retina of the eye.

Question 9. What is the difference between the eyes of the night birds and day birds ? Answer: The day birds can see clearly during the day but not at night. The day birds have more cones and less rods. The cones are sensitive to bright light and can sense colours. Night birds can see clearly at night but not cjuring the day. Their eyes have a large cornea and pupil to allow more lighted pass. Also their retina has mostly rods and few cones. Rods are more sensitive to dim light. –

Question 10. What is cataract of the eye ? Answer: Cataract is a condition in which the lens becomes milky. Light does not pass through such a lens to reach the retina. It can be corrected by replacing the lens with a synthetic lens.

Question 11. What are the causes of blindness ? Answer: Blindness may be caused due to damage to :

• the complete eye

Question 12. How do visually impaired people communicate ? Answer: Visually impaired people can communicate by following methods :

• By using the Braille system which employs groups of dots to represent printed letters and numbers.
• in 1980, Braille computer software was developed. It can input, output and translate documents to and from Braille.
• by speech technology that can convert ordinary text into speech.

Question 13. How is Braille system used ? Answer: Every character in the Braille code is based on the arrangement of one to six raised dots. Each dot has a numbered position in the Braille cell. These characters make up the letters of the alphabet, punctuation marks, numbers and everything else that can be printed does not have a separate alphabet of capital letters as there is in a print.

Question 14. Explain how a screen reader can help visually impaired people ? Answer: A screen reader is a software programme that provides access to computer software applications and the internet by using a speech synthesizer to read the information on the monitor loudly.

Question 15.

• For how long does the image remain on the retina ?
• How are we able to see a moving picture ?
• The imperssion of an image is retained on the retina for about l/16th of a second.
• If still images are projected on the retina at the rate more than 16 pictures per second, – then the eye will see the pictures moving.

NCERT Solutions for Class 8 Science Chapter 16 – 5 Mark Questions and Answers

Question 1. How can you compare human eye with a photographic camera ? [MSE (Chandigarh) 2008] Answer:

Question 3. Differentiate between regular and diffused reflection. Does diffused reflection mean the failure of the laws of reflection ? [NCERT] Answer: When the reflected rays are parallel to each other, it is known as regular reflection. When the reflected rays are not parallel, the reflection is known as diffused or irregular reflection. Diffused reflection is not due to the failure of the laws of reflection. It is caused by irregularities in the reflecting surface.

Question 4. Mention against each of the following whether regular or diffused reflection will take place when a beam of light strikes. Justify your answer in each case. [NCERT]

• polished wooden table
• chalk powder
• cardboard surface and
• marble floor with water spread over it and
• mirror will show regular reflection. This happens because the surface is plane without any defects.
• piece of paper show irregular reflection because the reflecting surface is not smooth. There are irregularities in the reflecting surface.

Question 5. Fill in the blanks in the following : [NCERT]

• A person 1 m inffont of a plane mirror seems to be ………… m away from his image.
• If you touch your …………. ear with right hand in front of a plane mirror it will be seen in the mirror that your right ear is touched with .
• The size of the pupil becomes ………….. when you see in dim light.
• Night birds have ………….. cones than rods in their eyes.
• left, left hand

Question 6. Describe the construction of a kaleidoscope. [NCERT] Answer: To make a kaleidoscope, get three rectangular strips of glass 15 cm long and 4 cm wide each. Join them together to form a prism. Fix them with a few thick chart papers in a slightly long circular tube. Close one end of the tube by a cardboard disc having a hole in centre. At the other end touching the mirrors fix a circular plane glass sheet. Invert the tube and place some broken small pieces of coloured bangles on the glass plate. Close this end of the tube by a ground glass plate.

Question 7. Explain how you can take care of your eyes. [NCERT] Answer: We can take care of our eyes in the following ways-

• have a regular check up.
• avoid too much or too little light,
• wash your eyes frequently with clean water.
• always read at the normal distance for vision.

Question 8. Give four properties of the image of an object formed by a plane mirror. Answer: The properties of the image formed by a plane mirror

• The image is formed as far behind the mirror as the object is in front of it.
• The image formed is a virtual image.
• The image formed is an erect image and of same size of the object.
• The image formed is laterally inverted with respect to the object.

Question 10.

• Find out the position of the image of an object situated at A in the plane mirror (figure). [NCERT]
• Can Paheli at B see this image ?
• Can Boojho at C see this image ?

• Yes Paheli can see the image of A.
• Yes, Boojho can see this image.
• When Paheli moves from B to C, the image of A will move from B to C.

Question 11.

• What is myopia ?
• How is it caused ?
• How can it be corrected ?
• Draw diagrams to show myopic eye and its correction.
• When a person can see nearby object clearly, but not far away objects, he is suffering from myopia.
• It is caused by the flattening of the eyeball and the lens becomes thick and rigid.
• It can be corrected by using spectacles with concave lenses.

• What is hypermetropia ?
• Draw diagram to show defective eye and its correction.
• A person suffering from hypermetropia can clearly see distant objects but finds difficulty in reading, writing and viewing different objects.
• It is caused by the elongation of the eyeball and the lens becomes flat.
• It can be corrected by using a convex lens.

NCERT Solutions for Class 8 Science Chapter 16 MCQs

Question 1. Which of the following material cannot be used to make a lens ? [NCERT] (a) Plastics (b) Water (c) Clay (d) Glass Answer: (c)

Question 2. Which of the following would you prefer, to read very small letters printed on the pages of a dictionary ? [NCERT] (a) A convex lens of focal length 100 cm (b) A concave lens of focal length 10 cm (c) A concave lens of focal length 5 cm (d) A convex lens of focal length 5 cm Answer: (d)

Question 3. A pond of water appears shallow because of (a) reflection (b) refraction (c) dispersion (d) none of these Answer: (b)

Question 4. The phenomenon of the splitting of white light into seven colours is called as (a) dispersion (b) refraction (c) reflection (d) deviation Answer: (a)

Question 5. In air all colours propagate (a) with different speed (b) nearly same speed (c) with minimum speed of red colour (d) with maximum speed of violet colour Answer: (b)

Question 6. The phenomenon of dispersion is not visible in a (a) prism (b) glass slab (c) mirror (d) none of these Answer: (b)

Question 7. If the refractive index is more then optical density is (a) more (b) less (c) equal (d) independent of refractive index Answer: (a)

Question 8. On refraction through a parallel faced glass slab the emergent ray is (a) parallel to incident ray (b) displaced w.r.t. incident ray (c) is not displaced w.r.t. incident ray (d) both (a) and (b) Answer: (d)

Question 9. When a ray of light propagating (in a straight line) in one transparent medium to enter another transparent medium (a) it gains speed (b) it losses speed (c) it neither gains nor losses speed (d) its speed in second medium depends upon relative refractive index for a given pair Answer: (d)

Question 10. If lower half of a convex lens is painted black then (a) no image is formed (b) only erect image is formed (c) only diminished image is formed (d) image is formed but is of reduced intensity. Answer: (d)

Question 11. The change in focal length of an eye lens, to focus the image of objects at varying distances, is done by the action of (a) pupil (b) iris (c) retina (d) ciliary muscles Answer: (d)

Question 12. The human eye can focus objects at different distances by adjusting the focal length of the eye lens. This ability of the eye is known as (a) persistence of vision (b) far-sightedness (c) near-sightedness (d) power of accomodation Answer: (d)

Question 13. The least distance of distinct vision ‘for a young adult with normal vision is (nearly) (a) 25 m (b) 25 cm (c) 2.5 cm (d) 2.5 m Answer: (b)

Question 14. The Braille system, for visually challenged persons,, is a (a) visual aid (b) auditory aid (c) tactual aid The eye lens is (d) electronic aid Answer: (c)

Question 15. The eye lens is (a) concave (b) convex (c) planoconcave (d) planoconvex Answer: (b)

Question 16. Eye problems happen due to lack of (a) Vitamin C (b) Vitamin D (c) Vitamin A (d) Vitamin B complex Answer: (c)

Question 17. The blind spot of the eye is (a) at the junction of optic nerve and retina (b) on one side of optic nerve (c) on one side of retina (d) in the centre of retina Answer: (a)

Question 18. The light sensitive cells having shape of cones (a) respond mainly to colours of incident light (b) respond mainly to amount of incident light (c) respond to both colour and amount of light (d) enables us to see in dark Answer: (a)

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Home » Extras » Class 8 Science Competency Based Questions 2024-25: Download PDF

Class 8 Science Competency Based Questions 2024-25: Download PDF

Class 8 Science Competency Based Questions are available for download here on aglasem.com. These Class 8 Competency Based Questions include MCQs, fill in the blanks, short answer questions, long answer questions, and answer key from the Science curriculum and need you to apply understanding a little beyond the 8th class Science textbook. For CBSE students, understanding and mastering these questions is crucial for success in Science exam. Here you will understand what Competency Based Questions for Science are, how they differ from traditional questions, and get tips on tackling these questions. You can also download Class 8 Competency Based Questions Science PDF .

Class 8 Science Competency Based Questions 2024-25

Here you can access a wide array of CBSE Competency Based Questions for the Science subject. The PDF includes Multiple Choice Questions, Fill in the Blanks, Short Answer Questions, and Long Answer Questions, along with the answer key for class 8 Science. The Competency Based Questions for Class 8 Science can be found here.

Class 8 Science Competency Focused Practice Questions Download Link – Click Here to Download 8 Science CBQ PDF

Class 8 Science Competency Based Questions PDF

The complete pdf for competency focused practice questions for Science is as follows.

What are Science Competency Based Questions?

These are designed to evaluate a student’s understanding of concepts of Science, their ability to apply knowledge in real-life situations, and their critical thinking skills. Unlike traditional questions that may focus on rote learning or memorization, Competency Focused Questions require students to demonstrate a deeper comprehension of the subject matter (Science). These questions measure various competencies in the Science subject, such as problem-solving, logical reasoning, creativity, and subject-specific skills.

For Class 8 Competency Based Questions of Science , students are expected to think beyond the Science textbook and demonstrate their skills in a way that aligns with real-world applications.

• Class 8 Competency Based Questions

In addition to Science, the Competency Focused Questions for all subjects for students in 8th standard are as follows.

Other Classes CBQ Download Links

Similarly the class wise CBQ practice question bank for school board are as follows.

• Class 3 Competency Based Questions
• Class 4 Competency Based Questions
• Class 5 Competency Based Questions
• Class 6 Competency Based Questions
• Class 7 Competency Based Questions
• Class 9 Competency Based Questions
• Class 10 Competency Based Questions

Class 8 Science Competency Questions  – An Overview

The highlights of this educational resource are as follows.

Competency Based Questions are revolutionizing the way students approach their studies. By focusing on the core competencies required by the CBSE board, students in Class 8 can develop the skills necessary to excel academically and beyond. Whether you are dealing with Class 8 Science Competency Based Questions or any other subject, remember to focus on understanding, application, and critical thinking.

Start practicing today, and make these questions a core part of your study strategy. The more you engage with these questions, the more confident you’ll become in your ability to tackle any challenge that comes your way!

If you have any queries on 8th Science Specimen Paper 2025, then please ask in comments below.

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Science Projects for Class 8

• Updated on  
• Jan 15, 2024

Science and its applications are way beyond the textbook experiments and class activities we did as kids. But to boost the interest of students in science and help them learn the basics, these simple and interesting experiments and observation projects enable them to understand varied basic concepts of Science. Often class 8 students are asked to submit their science project by the end of the year, in which they have to choose a topic, carry out an experiment and state the conclusion of their chosen scientific principle through their science project. Read this blog to learn about the best and most interesting science projects for class 8 which can help you delve deeper into the magic of science while also getting a higher score in your science class!

This Blog Includes:

Best science projects for class 8, top 45 science models for class 8, science projects for class 8 for exhibitions, measuring glucose in food, boiling point of water, baking soda volcano, red cabbage indicator, potato battery , thermal conductivity of metals, pinhole camera, create your own biodiesel, astronomical telescope, cotton candy machine, create a working model of the human heart.

Download NCERT Solutions Class 7 Science Chapter 8 Important Questions and Answers PDF

For science projects for class 8, students are generally asked to perform an experiment, conduct an activity or design a working model which elucidates the principle that they have chosen. Thus, we will explain to you how you can perform simple experiments as well as create a working model.

Here is a list of top Science Models that you can try:

• Drop an egg to prove the first law of motion
• Assemble a Newton’s cradle
• Blow out a candle with a balloon
• Relight a candle without touching it
• Measure and compare lung capacity
• Build an infinity mirror
• Brew up some root beer
• Construct a cup holder
• Assemble a spring scale
• Extract bismuth from Pepto-Bismol
• Make a solar desalinator
• Perform a starch test with iodine
• Keep your hands warm
• Explore symbiosis with nitrogen-fixing bacteria
• Crash cars for science
• Discover the center of gravity
• Power up homemade batteries
• Examine the connection between personality and memory
• Concoct and test your own shampoo
• Fuel a film canister rocket
• Stand on a pile of paper cups
• Create a rainbow of flames
• Get your laundry really clean
• Test water quality
• Fingerprint analysis
• Create a roller coaster loop
• Extract your DNA
• Separate water into hydrogen and oxygen
• Build a circuit to detect ripe produce
•  Discover the strength of interleaved paper
• Guide a growing plant through a maze
• Find out if peppermint improves reaction time
• Raise a hydraulic elevator
• Grow a carbon sugar snake
• Generate a Lichtenberg figure
• Teach a computer to play tic-tac-toe
• Cast animal tracks
• Construct a Rube Goldberg machine
• Block the sun’s UV rays
• Turn juice into spheres
• Measure your threshold of hearing 
• Measure how body temperature and reaction time vary throughout the day
• Model the human cardiovascular system
• Use spin tests to discover how your eyes and ears affect your balance and dizziness 
• Determine how much huddling reduces heat loss in warm-blooded animals

Here are some of the Science Projects for Class 8th Exhibitions that you can try:

The majority of the meals that we take in a day include carbohydrates or sugar. But the form in which we consume them is different and the one that is found inside the human body is different. In our body, glucose is broken down into simpler substances and you can opt for a glucose experiment for your Class 8 science project through which you can analyse the presence of carbohydrates in glucose and our food. As per your choice, collect some food items of daily life along with food dye, room temperature water, plastic glasses, knife and record your observations. You will also need glucose reading strips for this science project and create a positive strip by dipping a glucose strip into a sugar-based or glucose solution as well as a negative strip by dipping a glucose strip into the water. Then, test each of the foods you have taken with these two strips and record your observations. 

Water in its pure form has a specific boiling point and if we keep on adding some solutions or chemicals to water, its boiling point tends to change. For this simple and interesting science project for Class 8, you need some basic household items, i.e. sugar, salt, lemon juice, oil, oranges, jaggery, tea, etc. Ask an adult for supervision and assistance in helping you test the boiling point of water while adding a different item every time. Record your observation for these items and create your Science project accordingly. 

Having a homemade volcano is an amazing science science project. You need to build a cone shaped structure similar to a volcano with a container in the middle. Then in that container, add vinegar. Now, to demonstrate the working of the volcano, add baking soda along with some food colour to the vinegar. The volcano will erupt with effervescence which is generated due to the reaction of baking soda and vinegar thus releasing CO2 gas.

The red cabbage that we eat consists of a natural pH indicator that we can use to identify the nature of various substances. Since not many people are aware of this natural indicator, you can use red cabbage to create a unique Science project for Class 8. First, extract the juice of red cabbage and take some paper cups. Now, you need a specific amount of the following items in each paper cup:

• Baking Soda
• Lemon Juice

Now, pour the red cabbage juice into each cup until the colour of the liquid/powder [baking soda] changes. Note down your observations regarding the nature of acid and base in each item as indicated by the red cabbage and astonish your class with an amazing science experiment!

Do you know that the potato we use in our food can actually convert chemical energy into electrical energy? As a potato has many nutrients that act as chemicals in a particular setup, it can be used as an electrical battery and thus a unique working model for your Class 8 science project! You need a few potatoes to create your own potato battery and the process is quite simple. Take two potatoes, zinc and copper electrodes, 6 alligator clips and a small bulb/digital clock. First, insert the zinc and copper electrodes in the potatoes and then use alligator clips to attach the electrodes with the clock or bulb [adult supervision necessary].

You will see that the potatoes will charge electrodes and then the clock or the bulb will turn on automatically.

Amongst the most popular science projects for Class 8, you must have come across this one in day-to-day scenarios. Have you noticed that the pan in which we cook gets all heated up including the handles of it or the tong with which we cook our chapatis becomes hot? This is because of thermal conductivity in solids which means that the molecules of solids when heated up move in different directions and spread the heat. For your project, you can pick a bunch of solid items and check at which temperature the entire object gets heated up and up to which temperature.

You must have come across various high-end cameras, but a pinhole camera is something that you can construct from simple household products. The camera does not contain any type of lens rather it is a light-proof box which has a small hole on one of its sides. Light from one side will fall into it and then by using its effort, it will reflect the picture on the other side of it.  the image formed by this lens is inverted, thus,  it becomes a tree basis of your entire project. 

Science Working Model for Class 8

Here is a list of Science Working Models for Class 8:

• Wind Turbine
• Biogas plant

Now, let’s pick up some of these and learn how to make these models:

Biodiesel is made from vegetable oil and animal-fat based diesel fuel including long-chain alkyl and esters. Biodiesels are made by chemically reacting lipids, e.g., vegetable oils, animals with alcohol to produce fatty acid esters. The project is for renewable energy, physics, biology.

A telescope is an optical instrument to make observations to make distant objects look closer with an arrangement of lenses or curved mirrors. The rays of light are collected and focus on resulting in magnified images.

A cotton candy machine follows the same framework everywhere in the world and you can make it right at home. When sugar is heated, it becomes liquid caramel. If liquid caramel is pushed through tiny holes to the outside by centrifugal force when the container continuously rotates, cotton candy is made by recrystallization.

One of the most famous working models is the human heart’s working model. The project only requires a physioball, PVC Pipe cap, balloons, and drip pipe. The project will barely take an hour to complete and you will be able to impress your teacher with it.

Drop an egg to prove the first law of motion Assemble a Newton’s cradle Blow out a candle with a balloon Relight a candle without touching it Measure and compare lung capacity

The majority of the meals that we take in a day include carbohydrates or sugar. But the form in which we consume them is different and the one that is found inside the human body is different. In our body, glucose is broken down into simpler substances and you can opt for a glucose experiment for your Class 8 science project through which you can analyse the presence of carbohydrates in glucose and our food.

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Punjab Board PSEB Class 8 Computer Science Sample Paper 2024-25: Download The Free PDF!

Punjab board pseb class 8 computer science sample paper 2024-25: the punjab school education board has made available the sample papers for all the subjects for classes 8. students and teachers can download the free pdf..

Punjab Board PSEB Class 8 Computer Science Sample Paper 2024-25

We are providing the sample paper here. You can take a look at the sample paper for class 8 Computer Science.

Now, that the students have the sample paper with them, they can start preparing for the exam to score well. We are also providing the link below to download the sample paper PDF for free.

CHECK: Punjab Board PSEB Class 8 Computer Science Sample Paper 2024-25

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• NCERT Solutions
• NCERT Class 8
• NCERT 8 Science
• Chapter 8: Cell Structure And Functions

NCERT Solutions for Class 8 Science Chapter 8 Cell Structure and Functions

Ncert solutions for class 8 science chapter 8 – free pdf download.

*According to the latest update on the CBSE Syllabus 2023-24, this chapter has been removed.

NCERT Solutions for Class 8 Science Chapter 8 Cell Structure and Functions are prepared by the team of our subject experts to assist students in their school assignments and exam preparation. BYJU’S provides free NCERT Solutions for all the classes and subjects in a chapter-wise format. These  NCERT Solutions help students in gaining thorough knowledge on the definition of the cell, different types of cells, parts of the cell, nucleus, types of the nucleus, plant cell, animal cell, and the difference between plant and animal cell.

Chapter 8 of NCERT Solutions for Class 8 Science is a very important resource as it is basic for all biological studies. It is very important for the student to tune in with this topic in order to understand the topics of the higher classes. These NCERT Solutions for Class 8 Science comprise answers to all the questions present in Chapter 8. It also has exemplar problems, questions from previous years’ question papers, CBSE sample papers, worksheets, extra questions, and tips and methods to answer questions.

NCERT Solutions for Class 8 Science Chapter 8 Cell – Structure and Functions

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Access Answers to NCERT Class 8 Science Chapter 8 Cell – Structure and Functions

Exercise Questions

1. Indicate whether the following statements are True (T) or False (F).

(a) Unicellular organisms have one-celled body. (T/F)

(b) Muscle cells are branched. (T/F)

(c) The basic living unit of an organism is an organ. (T/F)

(d) Amoeba has irregular shape. (T/F)

2. Make a sketch of the human nerve cell. What function do nerve cells perform?

The main function of the nerve cell is to transmit messages to the brain from receptor organs and vice versa. It has control over the working of different parts of the body.

3. Write short notes on the following.

(a) Cytoplasm

(b) Nucleus of a cell

(a) Cytoplasm:

The cytoplasm is a fluid that contains all the cell organelles, such as the Mitochondria, Ribosomes, Golgi Bodies, etc. It is present between the nucleus and the plasma membrane. It helps in the exchange of materials between cell organelles. It is made up of eighty per cent water and is usually clear and colourless.

(b) Nucleus of a cell:

The nucleus is a double-membrane bound cell organelle present in eukaryotic cells. It contains the DNA, the genetic material. It is the command centre of the cell and is spherical in shape. It has the following components:

• Nuclear membrane
• Chromosomes
• Nuclear membrane:

It has a double-layered membrane. It separates the contents of the nucleus from the cytoplasm and acts as a wall. It has pores that allow the transfer of certain substances in and out of the cell.

2.  Nucleolus:

It is a small dense spherical body. It is not bound by any membrane.

3.  Chromosome:

These are thread-like structures that carry genes. All the necessary information required for the transfer of characteristics from the parents to the offspring is stored in the genes. Inheritance of characteristics is possible only because of chromosomes.

4. Which part of the cell contains organelles?

Various cell organelles are present in the cytoplasm. It is a clear and colourless fluid that contains organelles like Mitochondria, Ribosomes, and Golgi Bodies.

5. Make sketches of animal and plant cells. State the differences between them.

6. State the difference between eukaryotes and prokaryotes.

7. Where are chromosomes found in a cell? State their function.

Chromosomes are thread-like structures present in the nucleus that carry genes. All the necessary information required for transferring characteristics from the parents to the offspring is stored in the genes. Inheritance of characteristics is possible only because of chromosomes.

8. “Cells are the basic structural units of living organisms”. Explain.

Various components of plants and animals are constituted by cells. It is the smallest unit of life and is capable of all living functions. They are the building blocks of life. That is the reason why cells are referred to as ‘the basic structural and functional blocks of life’.

Cells exist in various shapes and sizes and perform a wide range of activities.

Their shapes and sizes are related to the function it performs.

9. Explain why chloroplasts are found only in plant cells.

Chloroplasts are plastids required for the food-making process called photosynthesis, and thus they are only present in plant cells.

10. Complete the crossword with the help of the clues given below.

1. This is necessary for photosynthesis.

3. Term for component present in the cytoplasm.

6. The living substance in the cell.

8. Units of inheritance present on the chromosomes.

1. Green plastids.

2. Formed by a collection of tissues.

4. It separates the contents of the cell from the surrounding medium.

5. Empty structure in the cytoplasm.

7. A group of cells.

• Chlorophyll
• Chloroplast

NCERT Solutions for Class 8 Science Chapter 8 Cell Structure and Functions – Summary

After referring to the NCERT Solutions for Class 8 Science Chapter 8, you will be able to write short notes on various parts of a cell, such as a nucleus, cytoplasm, etc. These NCERT Solutions make you learn the difference between Eukaryotes and Prokaryotes. Students also get knowledge of chromosomes, their location and other interesting topics.

Subtopics of NCERT Solutions Class 8 Science Chapter 8 Cell Structure and Functions

• Discovery of the Cell
• Variety in Cell Number, Shape and Size in Different Organisms
• Cell Structure and Function
• Parts of the Cell
• Comparison of Plant and Animal Cells.

NCERT Class 8 Solutions for Science Chapter 8 PDF helps students with self-confidence in their exam preparation. BYJU’S also provides the best study material that helps students in learning the basics of the science subject.

Students can also refer to the NCERT Solutions of other classes and subjects. These solutions are prepared by well-experienced tutors at BYJU’S focusing on providing clarity on key concepts and problem-solving skills.

Frequently Asked Questions on NCERT Solutions for Class 8 Science Chapter 8

Where are chromosomes found in a cell present in chapter 8 of ncert solutions for class 8 science, what are chromosomes explained in chapter 8 of ncert solutions for class 8 science, what is cytoplasm according to chapter 8 of ncert solutions for class 8 science.

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