experiment sentence chemistry

Mind that sometimes these sections are called differently but have the same purpose. Some of the sections may be missing, but the general structure should be close to this. Everything depends on the educational institution.

It is important to know that usually lab reports are written after the lab session is finished . This means that you need to have everything previously recorded in your lab notebook . You are supposed to keep track of everything you do in the lab in your laboratory notebook, and then using that notebook to write down your lab report, not the other way around.

Reviewing Every Step

Now, we’d like to go through the main stages of a chemistry lab report. It’s necessary to add brief comments concerning each of them. Your laboratory report begins with a title page. You already know what it consists of. Let’s check how to compose it correctly. The information must be presented on the upper right-hand side of the page. All the points (the title, your name, collaborators, etc.) should be mentioned on the separate line.

Afterward comes the second part, which includes:

• The course title
• Title of the experiment
• Title of the parts within the experiment
• Semester, year, etc. (optional)

This data appears in the middle of the title page.

The next section is the Introduction and it begins with this word in the left upper corner of your report. It should consist of no more than a couple of paragraphs and end with at least one hypothesis.

The body of your project consists of the procedure, materials and methods employed; data; results and observations.  The section Procedure commonly consists of several steps that were followed for the proper conduction of the experiment(s). They could be divided in different parts, and those would describe your actions.

The section Data contains the numerical facts and Observations that provide the changes that took place. Afterwards, you move to the Discussions, in which you ought to plainly explain all the numbers, observations and collected data. Your conclusions provide an overall summary of the entire lab report, and the whole experimental session itself.

Writing a Chemistry Lab Report

The last lap in our “race” is to write a laboratory report . We have already mentioned the main constituents of the title page. Therefore, we can hit the text of your project. Your abstract appears soon after the title page. An abstract is a quick summary that sums up the whole thing (hypothesis to be proven, and conclusions that are reached). Nonetheless, you should leave some space and skip it until the entire project is finished. It is recommended to write the abstract last. The main point is that this section provides a brief review of what your lab report is about and what you’ve managed to achieve.

Main Sections

The introductory part tells your readers what to expect from the project. Write a couple o paragraphs and explain the purpose of your experiment. Including references here is also highly encouraged. The last sentence of your introduction is called a hypothesis or a thesis statement. It shows what you hope to achieve at the end of your research.

The main body consists of several parts and of course, each has its purpose. You should introduce the materials and methods you need to conduct the research. Explain your choice and how your choice helps to conduct a safe and accurate study.

Take instant records of everything that happens during the experiment in your lab notebook . Never rely on your memory!

Afterwards, you’ll interpret the data and explain it using plain words. Don’t draw any conclusions when you record data and don’t explain it in the section called Results. This function should be fulfilled in the sections Discussions or Analysis sections, which should come right afterwards.

Your conclusion makes a brief summary. It should consist of 3-4 sentences, not many more. Restate your hypothesis in other words. Mention whether you’ve achieved your initial goal and explain its value.

Importantly, do realize that if a hypothesis cannot be proven, or an experiment doesn’t give you the results you expected, it doesn’t mean that your experiment and lab session was a failure. It is extremely common in chemistry to find yourself on this kind of situations! You only need to be able to explain why you got the results that you got, and how would you go around to fix them!

Further Sections on Your Report

Don’t forget about the contributors (labmates, supervisiors…) to your research.

You should also obligatorily use some secondary sources to support your theory. Therefore, you have to cite and make references according to the assigned writing format. You can reference other articles all over your manuscript (especially in the introduction and discussion sections), but don’t forget to put them together (or at the bottom of each page), and cite them properly.

The final step is to proofread your lab report. You’re free to use reading aloud and in your head, reading everything again, and using special grammar and spelling checking applications.

To sum up, keep in mind all these guidelines when you’re assigned to write a lab report. Thus, you’ll never miss something important, which can cost you essential grades. Write each section properly to receive the highest grades for your experiment. Always be clear, cite the appropriate references, and be objective with your analysis and conclusions!

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45 Cool Chemistry Experiments, Demos, and Science Fair Projects

Don’t forget your safety equipment!

Bunsen burners, colorful chemicals, and the possibility of a (controlled) explosion or two? Everybody loves chemistry experiments! We’ve rounded up the best activities, demos, and chemistry science fair projects for kids and teens. Try them in the classroom or at home.

Easy Chemistry Experiments and Activities for All Ages

Chemistry science fair projects.

These chemistry experiments and activities are all easy to do using simple supplies you probably already have. Families can try them at home, or teachers and students can do them together in the classroom.

Mix up some magic milk

Kids love this colorful experiment, which explores the concept of surface tension. This is one of our favorite chemistry experiments to try at home, since the supplies are so basic and the results are so cool!

Taste the Rainbow

Teach your students about diffusion while creating a beautiful and tasty rainbow. You’ll definitely want to have extra Skittles on hand so your class can enjoy a few as well!

Learn more: Skittles Diffusion

Crystallize sweet treats

Crystal science experiments teach kids about supersaturated solutions. This one is easy to do at home, and the results are absolutely delicious!

Learn more: Candy Crystals

Make elephant-sized toothpaste

This fun project uses yeast and a hydrogen peroxide solution to create overflowing “elephant toothpaste.” You can also add an extra fun layer by having kids create toothpaste wrappers for their plastic bottles.

Blow the biggest bubbles you can

Add a few simple ingredients to dish soap solution to create the largest bubbles you’ve ever seen! Kids learn about surface tension as they engineer these bubble-blowing wands.

Learn more: Giant Soap Bubbles

Demonstrate the “magic” leakproof bag

So simple and so amazing! All you need is a zip-top plastic bag, sharp pencils, and some water to blow your kids’ minds. Once they’re suitably impressed, teach them how the “trick” works by explaining the chemistry of polymers.

Learn more: Leakproof Bag

Use apple slices to learn about oxidation

Have students make predictions about what will happen to apple slices when immersed in different liquids, then put those predictions to the test! Finally, have them record their observations.

Learn more: Apple Oxidation

Float a marker man

Their eyes will pop out of their heads when you “levitate” a stick figure right off the table. This experiment works due to the insolubility of dry-erase marker ink in water, combined with the lighter density of the ink.

Learn more: Floating Marker Man

Discover density with hot and cold water

There are a lot of easy science experiments you can do with density. This one is extremely simple, involving only hot and cold water and food coloring, but the visuals make it appealing and fun.

Learn more: Layered Water

Layer more liquids

This density demo is a little more complicated, but the effects are spectacular. Slowly layer liquids like honey, dish soap, water, and rubbing alcohol in a glass. Kids will be amazed when the liquids float one on top of the other like magic (except it is really science).

Learn more: Layered Liquids

Grow a carbon sugar snake

Easy science experiments can still have impressive results. This eye-popping chemical reaction demonstration only requires simple supplies like sugar, baking soda, and sand.

Learn more: Carbon Sugar Snake

Make homemade bouncy balls

These homemade bouncy balls are easy to make since all you need is glue, food coloring, borax powder, cornstarch, and warm water. You’ll want to store them inside a container like a plastic egg because they will flatten out over time.

Learn more: Make Your Own Bouncy Balls

Create eggshell chalk

Eggshells contain calcium, the same material that makes chalk. Grind them up and mix them with flour, water, and food coloring to make your very own sidewalk chalk.

Learn more: Eggshell Chalk

Make naked eggs

This is so cool! Use vinegar to dissolve the calcium carbonate in an eggshell to discover the membrane underneath that holds the egg together. Then, use the “naked” egg for another easy science experiment that demonstrates osmosis .

Learn more: Naked Egg Experiment

Turn milk into plastic

This sounds a lot more complicated than it is, but don’t be afraid to give it a try. Use simple kitchen supplies to create plastic polymers from plain old milk. Sculpt them into cool shapes when you’re done.

Test pH using cabbage

Teach kids about acids and bases without needing pH test strips. Simply boil some red cabbage and use the resulting water to test various substances—acids turn red and bases turn green.

Learn more: Cabbage pH

Clean some old coins

Use common household items to make old oxidized coins clean and shiny again in this simple chemistry experiment. Ask kids to predict (hypothesize) which will work best, then expand the learning by doing some research to explain the results.

Learn more: Cleaning Coins

Blow up a balloon (without blowing)

Chances are good you probably did easy science experiments like this when you were in school yourself. This well-known activity demonstrates the reactions between acids and bases. Fill a bottle with vinegar and a balloon with baking soda. Fit the balloon over the top, shake the baking soda down into the vinegar, and watch the balloon inflate.

Learn more: Balloon Experiments

Assemble a DIY lava lamp

This 1970s trend is back—as an easy science experiment! This activity combines acid/base reactions with density for a totally groovy result.

Explore how sugary drinks affect teeth

The calcium content of eggshells makes them a great stand-in for teeth. Use eggs to explore how soda and juice can stain teeth and wear down the enamel. Expand your learning by trying different toothpaste and toothbrush combinations to see how effective they are.

Learn more: Sugar and Teeth Experiment

Mummify a hot dog

If your kids are fascinated by the Egyptians, they’ll love learning to mummify a hot dog. No need for canopic jars ; just grab some baking soda and get started.

Extinguish flames with carbon dioxide

This is a fiery twist on acid-base experiments. Light a candle and talk about what fire needs in order to survive. Then, create an acid-base reaction and “pour” the carbon dioxide to extinguish the flame. The CO2 gas acts like a liquid, suffocating the fire.

Send secret messages with invisible ink

Turn your kids into secret agents! Write messages with a paintbrush dipped in lemon juice, then hold the paper over a heat source and watch the invisible become visible as oxidation goes to work.

Learn more: Invisible Ink

Set popcorn dancing

This is a fun version of the classic baking soda and vinegar experiment, perfect for the younger crowd. The bubbly mixture causes popcorn to dance around in the water.

Learn more: Dancing Popcorn Experiment

Shoot a soda geyser sky-high

You’ve always wondered if this really works, so it’s time to find out for yourself! Kids will marvel at the chemical reaction that sends diet soda shooting high in the air when Mentos are added.

Learn more: Mentos and Coke Experiment

All of these chemistry experiments are perfect for using the scientific method. Form a hypothesis, alter the variables, and then observe the results! You can simplify these projects for younger kids, or add more complexity for older students.

Break apart covalent bonds

Difficulty: Medium / Materials: Medium

Break the covalent bond of H 2 O into H and O with this simple experiment. You only need simple supplies for this one. Turn it into a science fair project by changing up the variables—does the temperature of the water matter? What happens if you try this with other liquids?

Learn more: Breaking Covalent Bonds

Measure the calories in various foods

Are the calorie counts on your favorite snacks accurate? Build your own calorimeter and find out! This kit from Home Science Tools has all the supplies you’ll need.

Detect latent fingerprints

Forensic science is engrossing and can lead to important career opportunities too. Explore the chemistry needed to detect latent (invisible) fingerprints, just like they do for crime scenes!

Learn more: Fingerprints Project

Use Alka-Seltzer to explore reaction rate

Difficulty: Easy / Materials: Easy

Tweak this basic concept to create a variety of high school chemistry science fair projects. Change the temperature, surface area, pressure, and more to see how reaction rates change.

Determine whether sports drinks really have more electrolytes than other beverages

Difficulty: Medium / Materials: Advanced

Are those pricey sports drinks really worth it? Try this experiment to find out. You’ll need some special equipment for this one; buy a complete kit at Home Science Tools .

Turn flames into a rainbow

You’ll need to get your hands on a few different chemicals for this experiment, but the wow factor will make it worth the effort. Make it a science project by seeing if different materials, air temperature, or other factors change the results.

Discover the size of a mole

The mole is a key concept in chemistry, so it’s important to ensure students really understand it. This experiment uses simple materials like salt and chalk to make an abstract concept more concrete. Make it a project by applying the same procedure to a variety of substances, or determining whether outside variables have an effect on the results.

Learn more: How Big Is a Mole?

Cook up candy to learn mole and molecule calculations

This edible experiment lets students make their own peppermint hard candy while they calculate mass, moles, molecules, and formula weights. Tweak the formulas to create different types of candy and make this into a sweet science fair project!

Learn more: Candy Chemistry

Make soap to understand saponification

Take a closer look at an everyday item: soap! Use oils and other ingredients to make your own soap, learning about esters and saponification. Tinker with the formula to find one that fits a particular set of parameters.

Learn more: Saponification

Uncover the secrets of evaporation

Explore the factors that affect evaporation, then come up with ways to slow them down or speed them up for a simple science fair project.

Learn more: Evaporation

More Chemistry Experiment Science Fair Ideas

These questions and prompts can spark ideas for unique chemistry experiments:

• Compare the properties of sugar and artificial sweeteners.
• Explore the impact of temperature, concentration, and seeding on crystal growth.
• Test various antacids on the market to find the most effective product.
• What is the optimum temperature for yeast production when baking bread from scratch?
• Compare the vitamin C content of various fruits and vegetables.
• How does temperature affect enzyme-catalyzed reactions?
• Investigate the effects of pH on an acid-base chemical reaction.
• Devise a new natural way to test pH levels (such as cabbage leaves).
• What’s the best way to slow down metal oxidation (the form of rust)?
• How do changes in ingredients and method affect the results of a baking recipe?

Like these chemistry experiments? Don’t miss STEM Activities for Kids of All Ages and Interests .

Plus, get all the latest teaching news and ideas when you sign up for our free newsletters.

You Might Also Like

70 Best High School Science Fair Projects in Every Subject

Fire up the Bunsen burners! Continue Reading

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How to Write an Effective Conclusion for a Science Lab Report

Last Updated: August 9, 2024 Fact Checked

• Discussing the Experiment
• Writing What You Learned
• Ending Your Conclusion

Finalizing Your Lab Report

This article was co-authored by Bess Ruff, MA . Bess Ruff is a Geography PhD student at Florida State University. She received her MA in Environmental Science and Management from the University of California, Santa Barbara in 2016. She has conducted survey work for marine spatial planning projects in the Caribbean and provided research support as a graduate fellow for the Sustainable Fisheries Group. There are 10 references cited in this article, which can be found at the bottom of the page. This article has been fact-checked, ensuring the accuracy of any cited facts and confirming the authority of its sources. This article has been viewed 1,770,441 times.

A lab report describes an entire experiment from start to finish, outlining the procedures, reporting results, and analyzing data. The report is used to demonstrate what has been learned, and it will provide a way for other people to see your process for the experiment and understand how you arrived at your conclusions. The conclusion is an integral part of the report; this is the section that reiterates the experiment’s main findings and gives the reader an overview of the lab trial. Writing a solid conclusion to your lab report will demonstrate that you’ve effectively learned the objectives of your assignment.

How to Write a Lab Report Conclusion

• Restate the purpose of the experiment and your procedures.
• Describe the results or findings and if they support your hypothesis.
• Mention what you've learned from the experiment.
• Note any errors or uncertainties that could affect the results.
• Propose experiments for the future to gain more findings.

Outlining Your Conclusion

• Restate : Restate the lab experiment by describing the assignment.
• Explain : Explain the purpose of the lab experiment. What were you trying to figure out or discover? Talk briefly about the procedure you followed to complete the lab.
• Results : Explain your results. Confirm whether or not your hypothesis was supported by the results.
• Uncertainties : Account for uncertainties and errors. Explain, for example, if there were other circumstances beyond your control that might have impacted the experiment’s results.
• New : Discuss new questions or discoveries that emerged from the experiment.

• Your assignment may also have specific questions that need to be answered. Make sure you answer these fully and coherently in your conclusion.

Discussing the Experiment and Hypothesis

• If you tried the experiment more than once, describe the reasons for doing so. Discuss changes that you made in your procedures.
• Brainstorm ways to explain your results in more depth. Go back through your lab notes, paying particular attention to the results you observed. [3] X Trustworthy Source University of North Carolina Writing Center UNC's on-campus and online instructional service that provides assistance to students, faculty, and others during the writing process Go to source

• Start this section with wording such as, “The results showed that…”
• You don’t need to give the raw data here. Just summarize the main points, calculate averages, or give a range of data to give an overall picture to the reader.
• Make sure to explain whether or not any statistical analyses were significant, and to what degree, such as 1%, 5%, or 10%.

• Use simple language such as, “The results supported the hypothesis,” or “The results did not support the hypothesis.”

Demonstrating What You Have Learned

• If it’s not clear in your conclusion what you learned from the lab, start off by writing, “In this lab, I learned…” This will give the reader a heads up that you will be describing exactly what you learned.
• Add details about what you learned and how you learned it. Adding dimension to your learning outcomes will convince your reader that you did, in fact, learn from the lab. Give specifics about how you learned that molecules will act in a particular environment, for example.
• Describe how what you learned in the lab could be applied to a future experiment.

• On a new line, write the question in italics. On the next line, write the answer to the question in regular text.

• If your experiment did not achieve the objectives, explain or speculate why not.

Wrapping Up Your Conclusion

• If your experiment raised questions that your collected data can’t answer, discuss this here.

• Describe what is new or innovative about your research.
• This can often set you apart from your classmates, many of whom will just write up the barest of discussion and conclusion.

Community Q&A

• Ensure the language used is straightforward with specific details. Try not to drift off topic. Thanks Helpful 1 Not Helpful 0
• Once again, avoid using personal pronouns (I, myself, we, our group) in a lab report. The first-person point-of-view is often seen as subjective, whereas science is based on objectivity. Thanks Helpful 1 Not Helpful 0
• If you include figures or tables in your conclusion, be sure to include a brief caption or label so that the reader knows what the figures refer to. Also, discuss the figures briefly in the text of your report. Thanks Helpful 1 Not Helpful 0

• Take care with writing your lab report when working in a team setting. While the lab experiment may be a collaborative effort, your lab report is your own work. If you copy sections from someone else’s report, this will be considered plagiarism. Thanks Helpful 4 Not Helpful 0

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• ↑ https://phoenixcollege.libguides.com/LabReportWriting/introduction
• ↑ https://www.education.vic.gov.au/school/teachers/teachingresources/discipline/english/literacy/Pages/puttingittogether.aspx
• ↑ https://writingcenter.unc.edu/tips-and-tools/brainstorming/
• ↑ https://advice.writing.utoronto.ca/types-of-writing/lab-report/
• ↑ http://www.socialresearchmethods.net/kb/hypothes.php
• ↑ https://libguides.usc.edu/writingguide/conclusion
• ↑ https://libguides.usc.edu/writingguide/introduction/researchproblem
• ↑ http://writingcenter.unc.edu/handouts/scientific-reports/
• ↑ https://phoenixcollege.libguides.com/LabReportWriting/labreportstyle
• ↑ https://writingcenter.unc.edu/tips-and-tools/editing-and-proofreading/

About This Article

To write a good lab conclusion in science, start with restating the lab experiment by describing the assignment. Next, explain what you were trying to discover or figure out by doing the experiment. Then, list your results and explain how they confirmed or did not confirm your hypothesis. Additionally, include any uncertainties, such as circumstances beyond your control that may have impacted the results. Finally, discuss any new questions or discoveries that emerged from the experiment. For more advice, including how to wrap up your lab report with a final statement, keep reading. Did this summary help you? Yes No

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How To Write A Lab Report | Step-by-Step Guide & Examples

Published on May 20, 2021 by Pritha Bhandari . Revised on July 23, 2023.

A lab report conveys the aim, methods, results, and conclusions of a scientific experiment. The main purpose of a lab report is to demonstrate your understanding of the scientific method by performing and evaluating a hands-on lab experiment. This type of assignment is usually shorter than a research paper .

Lab reports are commonly used in science, technology, engineering, and mathematics (STEM) fields. This article focuses on how to structure and write a lab report.

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Table of contents

Structuring a lab report, introduction, other interesting articles, frequently asked questions about lab reports.

The sections of a lab report can vary between scientific fields and course requirements, but they usually contain the purpose, methods, and findings of a lab experiment .

Each section of a lab report has its own purpose.

• Title: expresses the topic of your study
• Abstract : summarizes your research aims, methods, results, and conclusions
• Introduction: establishes the context needed to understand the topic
• Method: describes the materials and procedures used in the experiment
• Results: reports all descriptive and inferential statistical analyses
• Discussion: interprets and evaluates results and identifies limitations
• Conclusion: sums up the main findings of your experiment
• References: list of all sources cited using a specific style (e.g. APA )
• Appendices : contains lengthy materials, procedures, tables or figures

Although most lab reports contain these sections, some sections can be omitted or combined with others. For example, some lab reports contain a brief section on research aims instead of an introduction, and a separate conclusion is not always required.

If you’re not sure, it’s best to check your lab report requirements with your instructor.

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Your title provides the first impression of your lab report – effective titles communicate the topic and/or the findings of your study in specific terms.

Create a title that directly conveys the main focus or purpose of your study. It doesn’t need to be creative or thought-provoking, but it should be informative.

• The effects of varying nitrogen levels on tomato plant height.
• Testing the universality of the McGurk effect.
• Comparing the viscosity of common liquids found in kitchens.

An abstract condenses a lab report into a brief overview of about 150–300 words. It should provide readers with a compact version of the research aims, the methods and materials used, the main results, and the final conclusion.

Think of it as a way of giving readers a preview of your full lab report. Write the abstract last, in the past tense, after you’ve drafted all the other sections of your report, so you’ll be able to succinctly summarize each section.

To write a lab report abstract, use these guiding questions:

• What is the wider context of your study?
• What research question were you trying to answer?
• How did you perform the experiment?
• What did your results show?
• How did you interpret your results?
• What is the importance of your findings?

Nitrogen is a necessary nutrient for high quality plants. Tomatoes, one of the most consumed fruits worldwide, rely on nitrogen for healthy leaves and stems to grow fruit. This experiment tested whether nitrogen levels affected tomato plant height in a controlled setting. It was expected that higher levels of nitrogen fertilizer would yield taller tomato plants.

Levels of nitrogen fertilizer were varied between three groups of tomato plants. The control group did not receive any nitrogen fertilizer, while one experimental group received low levels of nitrogen fertilizer, and a second experimental group received high levels of nitrogen fertilizer. All plants were grown from seeds, and heights were measured 50 days into the experiment.

The effects of nitrogen levels on plant height were tested between groups using an ANOVA. The plants with the highest level of nitrogen fertilizer were the tallest, while the plants with low levels of nitrogen exceeded the control group plants in height. In line with expectations and previous findings, the effects of nitrogen levels on plant height were statistically significant. This study strengthens the importance of nitrogen for tomato plants.

Your lab report introduction should set the scene for your experiment. One way to write your introduction is with a funnel (an inverted triangle) structure:

• Start with the broad, general research topic
• Narrow your topic down your specific study focus
• End with a clear research question

Begin by providing background information on your research topic and explaining why it’s important in a broad real-world or theoretical context. Describe relevant previous research on your topic and note how your study may confirm it or expand it, or fill a gap in the research field.

This lab experiment builds on previous research from Haque, Paul, and Sarker (2011), who demonstrated that tomato plant yield increased at higher levels of nitrogen. However, the present research focuses on plant height as a growth indicator and uses a lab-controlled setting instead.

Next, go into detail on the theoretical basis for your study and describe any directly relevant laws or equations that you’ll be using. State your main research aims and expectations by outlining your hypotheses .

Based on the importance of nitrogen for tomato plants, the primary hypothesis was that the plants with the high levels of nitrogen would grow the tallest. The secondary hypothesis was that plants with low levels of nitrogen would grow taller than plants with no nitrogen.

Your introduction doesn’t need to be long, but you may need to organize it into a few paragraphs or with subheadings such as “Research Context” or “Research Aims.”

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A lab report Method section details the steps you took to gather and analyze data. Give enough detail so that others can follow or evaluate your procedures. Write this section in the past tense. If you need to include any long lists of procedural steps or materials, place them in the Appendices section but refer to them in the text here.

You should describe your experimental design, your subjects, materials, and specific procedures used for data collection and analysis.

Experimental design

Briefly note whether your experiment is a within-subjects  or between-subjects design, and describe how your sample units were assigned to conditions if relevant.

A between-subjects design with three groups of tomato plants was used. The control group did not receive any nitrogen fertilizer. The first experimental group received a low level of nitrogen fertilizer, while the second experimental group received a high level of nitrogen fertilizer.

Describe human subjects in terms of demographic characteristics, and animal or plant subjects in terms of genetic background. Note the total number of subjects as well as the number of subjects per condition or per group. You should also state how you recruited subjects for your study.

List the equipment or materials you used to gather data and state the model names for any specialized equipment.

List of materials

35 Tomato seeds

15 plant pots (15 cm tall)

Light lamps (50,000 lux)

Nitrogen fertilizer

Measuring tape

Describe your experimental settings and conditions in detail. You can provide labelled diagrams or images of the exact set-up necessary for experimental equipment. State how extraneous variables were controlled through restriction or by fixing them at a certain level (e.g., keeping the lab at room temperature).

Light levels were fixed throughout the experiment, and the plants were exposed to 12 hours of light a day. Temperature was restricted to between 23 and 25℃. The pH and carbon levels of the soil were also held constant throughout the experiment as these variables could influence plant height. The plants were grown in rooms free of insects or other pests, and they were spaced out adequately.

Your experimental procedure should describe the exact steps you took to gather data in chronological order. You’ll need to provide enough information so that someone else can replicate your procedure, but you should also be concise. Place detailed information in the appendices where appropriate.

In a lab experiment, you’ll often closely follow a lab manual to gather data. Some instructors will allow you to simply reference the manual and state whether you changed any steps based on practical considerations. Other instructors may want you to rewrite the lab manual procedures as complete sentences in coherent paragraphs, while noting any changes to the steps that you applied in practice.

If you’re performing extensive data analysis, be sure to state your planned analysis methods as well. This includes the types of tests you’ll perform and any programs or software you’ll use for calculations (if relevant).

First, tomato seeds were sown in wooden flats containing soil about 2 cm below the surface. Each seed was kept 3-5 cm apart. The flats were covered to keep the soil moist until germination. The seedlings were removed and transplanted to pots 8 days later, with a maximum of 2 plants to a pot. Each pot was watered once a day to keep the soil moist.

The nitrogen fertilizer treatment was applied to the plant pots 12 days after transplantation. The control group received no treatment, while the first experimental group received a low concentration, and the second experimental group received a high concentration. There were 5 pots in each group, and each plant pot was labelled to indicate the group the plants belonged to.

50 days after the start of the experiment, plant height was measured for all plants. A measuring tape was used to record the length of the plant from ground level to the top of the tallest leaf.

In your results section, you should report the results of any statistical analysis procedures that you undertook. You should clearly state how the results of statistical tests support or refute your initial hypotheses.

The main results to report include:

• any descriptive statistics
• statistical test results
• the significance of the test results
• estimates of standard error or confidence intervals

The mean heights of the plants in the control group, low nitrogen group, and high nitrogen groups were 20.3, 25.1, and 29.6 cm respectively. A one-way ANOVA was applied to calculate the effect of nitrogen fertilizer level on plant height. The results demonstrated statistically significant ( p = .03) height differences between groups.

Next, post-hoc tests were performed to assess the primary and secondary hypotheses. In support of the primary hypothesis, the high nitrogen group plants were significantly taller than the low nitrogen group and the control group plants. Similarly, the results supported the secondary hypothesis: the low nitrogen plants were taller than the control group plants.

These results can be reported in the text or in tables and figures. Use text for highlighting a few key results, but present large sets of numbers in tables, or show relationships between variables with graphs.

You should also include sample calculations in the Results section for complex experiments. For each sample calculation, provide a brief description of what it does and use clear symbols. Present your raw data in the Appendices section and refer to it to highlight any outliers or trends.

The Discussion section will help demonstrate your understanding of the experimental process and your critical thinking skills.

In this section, you can:

• Interpret your results
• Compare your findings with your expectations
• Identify any sources of experimental error
• Explain any unexpected results
• Suggest possible improvements for further studies

Interpreting your results involves clarifying how your results help you answer your main research question. Report whether your results support your hypotheses.

• Did you measure what you sought out to measure?
• Were your analysis procedures appropriate for this type of data?

Compare your findings with other research and explain any key differences in findings.

• Are your results in line with those from previous studies or your classmates’ results? Why or why not?

An effective Discussion section will also highlight the strengths and limitations of a study.

• Did you have high internal validity or reliability?
• How did you establish these aspects of your study?

When describing limitations, use specific examples. For example, if random error contributed substantially to the measurements in your study, state the particular sources of error (e.g., imprecise apparatus) and explain ways to improve them.

The results support the hypothesis that nitrogen levels affect plant height, with increasing levels producing taller plants. These statistically significant results are taken together with previous research to support the importance of nitrogen as a nutrient for tomato plant growth.

However, unlike previous studies, this study focused on plant height as an indicator of plant growth in the present experiment. Importantly, plant height may not always reflect plant health or fruit yield, so measuring other indicators would have strengthened the study findings.

Another limitation of the study is the plant height measurement technique, as the measuring tape was not suitable for plants with extreme curvature. Future studies may focus on measuring plant height in different ways.

The main strengths of this study were the controls for extraneous variables, such as pH and carbon levels of the soil. All other factors that could affect plant height were tightly controlled to isolate the effects of nitrogen levels, resulting in high internal validity for this study.

Your conclusion should be the final section of your lab report. Here, you’ll summarize the findings of your experiment, with a brief overview of the strengths and limitations, and implications of your study for further research.

Some lab reports may omit a Conclusion section because it overlaps with the Discussion section, but you should check with your instructor before doing so.

If you want to know more about AI for academic writing, AI tools, or fallacies make sure to check out some of our other articles with explanations and examples or go directly to our tools!

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A lab report conveys the aim, methods, results, and conclusions of a scientific experiment . Lab reports are commonly assigned in science, technology, engineering, and mathematics (STEM) fields.

The purpose of a lab report is to demonstrate your understanding of the scientific method with a hands-on lab experiment. Course instructors will often provide you with an experimental design and procedure. Your task is to write up how you actually performed the experiment and evaluate the outcome.

In contrast, a research paper requires you to independently develop an original argument. It involves more in-depth research and interpretation of sources and data.

A lab report is usually shorter than a research paper.

The sections of a lab report can vary between scientific fields and course requirements, but it usually contains the following:

• Abstract: summarizes your research aims, methods, results, and conclusions
• References: list of all sources cited using a specific style (e.g. APA)
• Appendices: contains lengthy materials, procedures, tables or figures

The results chapter or section simply and objectively reports what you found, without speculating on why you found these results. The discussion interprets the meaning of the results, puts them in context, and explains why they matter.

In qualitative research , results and discussion are sometimes combined. But in quantitative research , it’s considered important to separate the objective results from your interpretation of them.

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Chemistry writing guide, introduction, writing assignments, discipline-specific strategies, watch out for..., professor's comments and websites.

Writing in chemistry is similar to writing in other disciplines in that your paper must have a clear purpose that explains why you are writing, a thesis statement or main idea that defines the problem to be addressed, and background information wherever necessary. In addition, you should include evidence in the form of figures, graphs, and tables to support your argument.

You will be asked to write an abstract -- a single-spaced paragraph summary that briefly states the purpose of the experiment, important results (and how the results were obtained), and conclusions. Ideally, the abstract can be thought of as one or two sentences from each section of the paper that form a cohesive paragraph that summarizes the entire paper. The abstract should be single spaced unless you receive other instructions from your professor.

When writing an abstract, you should avoid too much experimental detail (e.g. concentration of stock solutions used) or preliminary results (i.e. "raw" data). In addition, make certain that the purpose of the experiment is stated clearly and early in the abstract. Ideally, it should be stated in the first or second sentence.

Lab Reports

There are six main sections in a chemistry paper: introduction, experimental section, results section, discussion section, conclusion, and list of references. As with most disciplines, the introduction should include your background knowledge of the experiment, including theory and past research, the relevance of your research, and the thesis statement. You may also state in your introduction any general conclusions you discovered, but try to avoid making your introduction longer than a page. The purpose of the introduction in a chemical journal is to provide (1) a literature review of what has been published on the subject to justify the importance of your research, (2) an explanation of any unusual experimental approaches, and (3) any background information or explanations that will help the reader understand your experiment and your results. Ultimately, the introduction should explain how the experimental approach you chose allows you to find the numerical or qualitative results you are looking for. For example, if you're going to determine if the substance you synthesized is a particular compound by examining its UV-Vis spectrum, you should find in the literature or a reference book the maximum wavelength of the compound and present it in the introduction. The experimental section focuses on the details of the experiment. Be certain to include enough information so that the reader could repeat the experiment and obtain similar results within the limits of uncertainty. The following should be addressed in this section: treatment of data (e.g. calculations or computations used to generate graphs) and an identification of instruments and sources of materials used (e.g. synthesized within the lab or bought from Aldrich, Sigma, or Fluka). For commercially available equipment, the manufacturer and the model should be mentioned (e.g. JASCO UV-Vis Spectrophotometer). The results section should include any figures, graphs, and tables that summarize the data. The material in this section should be presented in the order that best defends the thesis and the order in which they will be addressed in the discussion section. The order in which the data was collected is rarely important. For example, just because the data for graph N was collected before that of graph M does not mean that M shouldn't be presented first if it makes the presentation of data more coherent. In the results section, graphs are usually listed as figures. Tables are numbered and given specific titles (must include concentrations, volumes, etc.), which are placed at the top of the table. Figures (graphs or any other visuals) are numbered and given a caption, not a title. The caption should be several sentences long and explain what the figure is, what result is found from the figure, and the importance of the result. Captions are placed below the figure. For a results section, the text, tables, and figures should mirror each other. That is, the text must include all of the important information given in the graphs and tables, but in written form. If a table or figure is included in the report, it must be specifically referenced in the text as at the end of this sentence (Table 1). It might also be worthwhile to note that figures and tables are usually submitted to a journal and also to a professor with the tables and figures attached to the end of the report, not interspersed throughout the text. Journals insert your figures and tables according to their page format. In the discussion section, you should explain your results and observations and illustrate how they support your thesis, discuss any possible sources of error, and suggest potential future research stemming from your results. You may also want to mention any past research in the field that may pertain to your experiment's results.

Something to think about: results and discussion sections are often combined in chemical journals. In that case, each result is presented and then its relevance is explained. If you are writing a results section alone, you should only present, not interpret, your results. For example, a statement like, "The UV-Vis spectrum of the complex showed a peak at 291 nm" is a statement of your numerical result and is appropriate for a results section. A statement like, "The peak at 291 nm indicates that the complex changed conformation" is interpretive and belongs in a discussion section. Your conclusion should contain a brief summary of the paper and must state important results (e.g. yield of product) and assess the research with respect to the purpose. This section may be combined with the discussion section; that is, the last paragraph of the discussion section may act as a conclusion. In the reference section you must list all non-original sources used in the paper in the order in which they appear with the appropriate number. Citations should be made according to the format of the journal to which you will submit your paper. For a Swarthmore class, the Journal of the American Chemical Society format is appropriate. Unlike other disciplines, citations in a chemistry paper are usually not in-text or parenthetical, but incorporated using superscripts as at the end of this sentence. 1 It is sometimes appropriate in a discussion section to refer to other researchers by name and end the sentence with a reference. For example, "Khmelnitksy, et al. found that trypsin denatures in 2-propanol." 2

• Chemistry papers should be written in passive voice (unless you receive other instructions from your professor).
• Abbreviations or acronyms must be explained the first time they are used.
• Figures, graphs, and tables must be titled and referenced in the text.
• References (including textbooks and lab manuals) must be cited and numbered consecutively with the superscript number corresponding to that reference in the reference section of the paper. The use of superscript suffices as the mode of reference because it eliminates the need for in-text citations and footnotes.

I. Organization: As for all lab reports, chemistry reports are very structured and must be highly organized in a logical way. Organization of results is especially important. Your results and discussion sections, as well as tables and figures, should be organized in a way that leads the reader to draw the same conclusion that you did based on your data. Don't just tack on a graph at the end of the paper or arbitrarily put your results into a table. Think about how you can use tables to make comparisons between your data and literature or reference values. Think about the format of your tables and the chronology of your results section. How can you present your results so that the reader is already convinced of your conclusion before you explicitly state it?

II. Repetition: If you've already said it once, or it's already been published somewhere else, don't say it again. You can refer to other parts of your paper instead of repeating explanations or facts. If you've already written an experimental methods section, you've already explained your procedure; there is no need to provide procedural details again when you talk about results. If the procedure you used came from a published article, provide a short summary, explain any alterations, and then give the citation. Also, if you explain someone else's experimental results in the introduction, it is acceptable to write statements like, "As discussed above, Khmelnitsky, et al. found contradictory results" in your results section. Journals have page limits. Repetitious or unnecessary words or figures are unwelcome.

III. Distraction: Remember that the whole point of writing a chemistry paper is to present results and prove your conclusion based on those results. There are a lot of numbers, facts, and procedure information that you can easily get bogged down by. Just remember that ultimately you have to convince the reader that your conclusion is accurate. If you feel overwhelmed by the amount of information you have to include, try making a flow chart that shows the logical progression of your procedure. Or create your figures and tables first, and then use them as an outline or guide to write your results section. Take a look at published articles to get a sense of how others organize papers and what kinds of phrases and sentence structure are useful and accepted.

Courses Taught: General Chemistry, Organic I and II laboratories

Particular stylistic issues you should keep in mind:

"Write as concisely as possible. Know the meanings of the words you use and choose the best word for your purpose."

Grammar/spelling and word choice pet peeves:

• Using "this" and "that' as undefined pronouns
• Using "so" without "that" or "as"
• Misspelling of terms that are presented in the manual

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Sentences with phrase «chemistry experiment»

• Definition of CHEMISTRY EXPERIMENT
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Chemistry Lab Resources (for CHM 1XX and 2XX Labs)

• Organizing Your Lab Notebook
• Parts of a Lab Report
• Writing Your Lab Report/Worksheet
• Graphs/Tables
• Common Calculations
• Citing Sources
• Finding Chemical Properties
• Lab techniques, instrumentation, and protocols
• Chemical Safety

General tips

Whether you are filling out lab worksheets or writing up entire lab reports, there are a few tips that will help you to create more detailed and professional documents and to assist in grading:

• Always label your units
• Show all of your calculations (don’t leave out steps)
• Use complete sentences
• Write neatly
• Strike out mistakes with a single line
• Be aware of significant figures, noting the sensitivity of the device you are using for your measurements

Why do we write lab reports in passive voice?

It’s part of the scientific point of view.  We observe and record as objectively as possible, avoiding personal bias by removing ourselves.  Using the passive voice also clarifies procedures and descriptions so they can be easily reproduced and compared.

NOTE: DO NOT write reports as directions, such as those given in your lab manual. For example, do not write, "Heat the solution until it boils." Instead, write "The solution was heated to boiling."

Write in the third person - Scientific experiments demonstrate facts that do not depend on the observer, therefore, reports should avoid using the first and second person (I,me,my,we,our, OR us.)

Using the correct verb tense - Lab reports and research papers should be mainly written in the present tense. You should limit the use of the past tense to (1) describe specific experimental methods and observations, and (2) citing results published in the past.

Tables and Figures - Should be used when they are a more efficient ways to convey information than verbal description. They must be independent units, accompanied by explanatory captions that allow them to be understood by someone who has not read the text.

Writing in the passive voice

Examples of passive voice in lab reports

200mL of distilled water was poured into a 500 mL beaker.

I poured 200mL of distilled water in a beaker. (active voice)

Pour 200mL water in a beaker. (direction/command)

The covered crucible was mounted on a ring stand.

We put the crucible on a ring stand. (active voice)

Set the crucible on a ring stand. (direction/command)

The temperature was initially measured at 75°C.

I measured the temperature at 75°C. (active voice)

Measure and write down the temperature. (direction/command)

It's understood that all actions were done by the experimenter.

Avoiding Plagiarism

• Avoiding Plagiarism From Purdue's OWL

Passive voice information derived from original work at Delta College Teaching/Learning Center

http://www.delta.edu/files/TLC/Writing%20Lab%20Reports%2009.doc

Writing a Lab Report

Purdue students explain strategies for dividing the workload for writing a lab report.

Sample Lab Reports

• Determination of the Alcohol Content of Whiskey [Courtesy of Univ. of Oregon]
• Synthesis and Characterization of Luminol [Courtesy of Truman State Univ.]
• Production of Biodiesel [Courtesy of Univ. of Vermont]
• << Previous: Parts of a Lab Report
• Next: Graphs/Tables >>
• Last Edited: Aug 5, 2024 4:46 PM
• URL: https://guides.lib.purdue.edu/chemlabs

What Are Examples of a Hypothesis?

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A hypothesis is an explanation for a set of observations. Hypothesis examples can help you understand how this scientific method works.

Although you could state a scientific hypothesis in various ways, most hypotheses are either "If, then" statements or forms of the null hypothesis. The null hypothesis is sometimes called the "no difference" hypothesis. The null hypothesis is good for experimentation because it's simple to disprove. If you disprove a null hypothesis, that is evidence for a relationship between the variables you are examining.

Hypotheses Examples: Null

• All daisies have the same number of petals.
• Hyperactivity is unrelated to eating sugar.
• The number of pets in a household is unrelated to the number of people living in it.
• A person's preference for a shirt is unrelated to its color.

Hypotheses Examples: If, Then

• If you get at least 6 hours of sleep, you will do better on tests than if you get less sleep.
• If you drop a ball, it will fall toward the ground.
• If you drink coffee before going to bed, then it will take longer to fall asleep.
• If you cover a wound with a bandage, then it will heal with less scarring.

Improving a Hypothesis to Make It Testable

You may wish to revise your first hypothesis to make it easier to design an experiment to test. For example, let's say you have a bad breakout the morning after eating a lot of greasy food. You may wonder if there is a correlation between eating greasy food and getting pimples. You propose the hypothesis example:

Eating greasy food causes pimples.

Next, you need to design an experiment to test this hypothesis. Let's say you decide to eat greasy food every day for a week and record the effect on your face. Then, as a control, you'll avoid greasy food for the next week and see what happens. Now, this is not a good experiment because it does not take into account other factors such as hormone levels, stress, sun exposure, exercise, or any number of other variables that might conceivably affect your skin.

The problem is that you cannot assign cause to your effect . If you eat french fries for a week and suffer a breakout, can you definitely say it was the grease in the food that caused it? Maybe it was the salt. Maybe it was the potato. Maybe it was unrelated to diet. You can't prove your hypothesis. It's much easier to disprove a hypothesis.

So, let's restate the hypothesis to make it easier to evaluate the data:

Getting pimples is unaffected by eating greasy food.

So, if you eat fatty food every day for a week and suffer breakouts and then don't break out the week that you avoid greasy food, you can be pretty sure something is up. Can you disprove the hypothesis? Probably not, since it is so hard to assign cause and effect. However, you can make a strong case that there is some relationship between diet and acne.

If your skin stays clear for the entire test, you may decide to accept your hypothesis . Again, you didn't prove or disprove anything, which is fine

• Null Hypothesis Examples
• The Role of a Controlled Variable in an Experiment
• Random Error vs. Systematic Error
• What Is a Testable Hypothesis?
• What Are the Elements of a Good Hypothesis?
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• What Is a Hypothesis? (Science)
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• Understanding Simple vs Controlled Experiments
• Six Steps of the Scientific Method
• What Is an Experimental Constant?
• What Is the Difference Between a Control Variable and Control Group?
• What Is a Controlled Experiment?
• Scientific Variable
• DRY MIX Experiment Variables Acronym

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Independent and Dependent Variables Examples

The independent and dependent variables are key to any scientific experiment, but how do you tell them apart? Here are the definitions of independent and dependent variables, examples of each type, and tips for telling them apart and graphing them.

Independent Variable

The independent variable is the factor the researcher changes or controls in an experiment. It is called independent because it does not depend on any other variable. The independent variable may be called the “controlled variable” because it is the one that is changed or controlled. This is different from the “ control variable ,” which is variable that is held constant so it won’t influence the outcome of the experiment.

Dependent Variable

The dependent variable is the factor that changes in response to the independent variable. It is the variable that you measure in an experiment. The dependent variable may be called the “responding variable.”

Examples of Independent and Dependent Variables

Here are several examples of independent and dependent variables in experiments:

• In a study to determine whether how long a student sleeps affects test scores, the independent variable is the length of time spent sleeping while the dependent variable is the test score.
• You want to know which brand of fertilizer is best for your plants. The brand of fertilizer is the independent variable. The health of the plants (height, amount and size of flowers and fruit, color) is the dependent variable.
• You want to compare brands of paper towels, to see which holds the most liquid. The independent variable is the brand of paper towel. The dependent variable is the volume of liquid absorbed by the paper towel.
• You suspect the amount of television a person watches is related to their age. Age is the independent variable. How many minutes or hours of television a person watches is the dependent variable.
• You think rising sea temperatures might affect the amount of algae in the water. The water temperature is the independent variable. The mass of algae is the dependent variable.
• In an experiment to determine how far people can see into the infrared part of the spectrum, the wavelength of light is the independent variable and whether the light is observed is the dependent variable.
• If you want to know whether caffeine affects your appetite, the presence/absence or amount of caffeine is the independent variable. Appetite is the dependent variable.
• You want to know which brand of microwave popcorn pops the best. The brand of popcorn is the independent variable. The number of popped kernels is the dependent variable. Of course, you could also measure the number of unpopped kernels instead.
• You want to determine whether a chemical is essential for rat nutrition, so you design an experiment. The presence/absence of the chemical is the independent variable. The health of the rat (whether it lives and reproduces) is the dependent variable. A follow-up experiment might determine how much of the chemical is needed. Here, the amount of chemical is the independent variable and the rat health is the dependent variable.

How to Tell the Independent and Dependent Variable Apart

If you’re having trouble identifying the independent and dependent variable, here are a few ways to tell them apart. First, remember the dependent variable depends on the independent variable. It helps to write out the variables as an if-then or cause-and-effect sentence that shows the independent variable causes an effect on the dependent variable. If you mix up the variables, the sentence won’t make sense. Example : The amount of eat (independent variable) affects how much you weigh (dependent variable).

This makes sense, but if you write the sentence the other way, you can tell it’s incorrect: Example : How much you weigh affects how much you eat. (Well, it could make sense, but you can see it’s an entirely different experiment.) If-then statements also work: Example : If you change the color of light (independent variable), then it affects plant growth (dependent variable). Switching the variables makes no sense: Example : If plant growth rate changes, then it affects the color of light. Sometimes you don’t control either variable, like when you gather data to see if there is a relationship between two factors. This can make identifying the variables a bit trickier, but establishing a logical cause and effect relationship helps: Example : If you increase age (independent variable), then average salary increases (dependent variable). If you switch them, the statement doesn’t make sense: Example : If you increase salary, then age increases.

How to Graph Independent and Dependent Variables

Plot or graph independent and dependent variables using the standard method. The independent variable is the x-axis, while the dependent variable is the y-axis. Remember the acronym DRY MIX to keep the variables straight: D = Dependent variable R = Responding variable/ Y = Graph on the y-axis or vertical axis M = Manipulated variable I = Independent variable X = Graph on the x-axis or horizontal axis

• Babbie, Earl R. (2009). The Practice of Social Research (12th ed.) Wadsworth Publishing. ISBN 0-495-59841-0.
• di Francia, G. Toraldo (1981). The Investigation of the Physical World . Cambridge University Press. ISBN 978-0-521-29925-1.
• Gauch, Hugh G. Jr. (2003). Scientific Method in Practice . Cambridge University Press. ISBN 978-0-521-01708-4.
• Popper, Karl R. (2003). Conjectures and Refutations: The Growth of Scientific Knowledge . Routledge. ISBN 0-415-28594-1.

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Definition of experiment

 (Entry 1 of 2)

Definition of experiment  (Entry 2 of 2)

intransitive verb

• experimentation

Examples of experiment in a Sentence

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'experiment.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Middle English, "testing, proof, remedy," borrowed from Anglo-French esperiment, borrowed from Latin experīmentum "testing, experience, proof," from experīrī "to put to the test, attempt, have experience of, undergo" + -mentum -ment — more at experience entry 1

verbal derivative of experiment entry 1

14th century, in the meaning defined at sense 1a

1787, in the meaning defined above

Phrases Containing experiment

• control experiment
• controlled experiment
• experiment station
• pre - experiment
• thought experiment

Articles Related to experiment

This is the Difference Between a...

This is the Difference Between a Hypothesis and a Theory

In scientific reasoning, they're two completely different things

Dictionary Entries Near experiment

experiential time

experimental

Cite this Entry

“Experiment.” Merriam-Webster.com Dictionary , Merriam-Webster, https://www.merriam-webster.com/dictionary/experiment. Accessed 21 Aug. 2024.

Kids Definition

Kids definition of experiment.

Kids Definition of experiment  (Entry 2 of 2)

Medical Definition

Medical definition of experiment.

Medical Definition of experiment  (Entry 2 of 2)

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CHEMISTRY in a Sentence Examples: 21 Ways to Use Chemistry

Chemistry is the scientific study of matter, its properties, composition, structure, and the changes it undergoes during chemical reactions. It is a branch of science that delves into the understanding of the elements and compounds that make up our world.

Table of Contents

7 Examples Of Chemistry Used In a Sentence For Kids

14 sentences with chemistry examples, how to use chemistry in sentences.

To use Chemistry in a sentence, start by identifying the main chemical element or concept you want to reference. For example, say “The reaction between hydrochloric acid and sodium hydroxide produces salt and water.” In this sentence, we have highlighted the chemical elements involved in the reaction.

Next, make sure to provide context or additional information to explain the relevance of the chemical element or concept in your sentence. For instance, you could say, “ Oxygen is essential for respiration in living organisms.” This clarifies why oxygen is important in that particular context.

Additionally, remember to use proper punctuation and grammar when incorporating Chemistry terms into your sentence. This helps to ensure clarity and accuracy. For example, “The molecular structure of water , H2O, consists of two hydrogen atoms and one oxygen atom.”

Lastly, if you are explaining a chemical process or reaction, it can be helpful to include the outcome or result of the interaction. For instance, “When carbon dioxide is dissolved in water, it forms carbonic acid.”

In summary, sentences with chemistry are essential in understanding the interactions and reactions of various substances. These sentences typically involve descriptions of the properties, structures, and behaviors of chemicals, aiding in the comprehension of complex scientific concepts. They also help in predicting outcomes in chemical experiments and reactions, forming the foundation of the field of chemistry.

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Summer holiday science: turn your home into a lab with these three easy experiments

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Audrey O'Grady receives funding from Science Foundation Ireland. She is affiliated with Department of Biological Sciences, University of Limerick.

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Many people think science is difficult and needs special equipment, but that’s not true.

Science can be explored at home using everyday materials. Everyone, especially children, naturally ask questions about the world around them, and science offers a structured way to find answers.

Misconceptions about the difficulty of science often stem from a lack of exposure to its fun and engaging side. Science can be as simple as observing nature, mixing ingredients or exploring the properties of objects. It’s not just for experts in white coats, but for everyone.

Don’t take my word for it. Below are three experiments that can be done at home with children who are primary school age and older.

Extract DNA from bananas

DNA is all the genetic information inside cells. Every living thing has DNA, including bananas.

Did you know you can extract DNA from banana cells?

What you need: ¼ ripe banana, Ziploc bag, salt, water, washing-up liquid, rubbing alcohol (from a pharmacy), coffee filter paper, stirrer.

What you do:

Place a pinch of salt into about 20ml of water in a cup.

Add the salty water to the Ziploc bag with a quarter of a banana and mash the banana up with the salty water inside the bag, using your hands. Mashing the banana separates out the banana cells. The salty water helps clump the DNA together.

Once the banana is mashed up well, pour the banana and salty water into a coffee filter (you can lay the filter in the cup you used to make the salty water). Filtering removes the big clumps of banana cells.

Once a few ml have filtered out, add a drop of washing-up liquid and swirl gently. Washing-up liquid breaks down the fats in the cell membranes which makes the DNA separate from the other parts of the cell.

Slowly add some rubbing alcohol (about 10ml) to the filtered solution. DNA is insoluble in alcohol, therefore the DNA will clump together away from the alcohol and float, making it easy to see.

DNA will start to precipitate out looking slightly cloudy and stringy. What you’re seeing is thousands of DNA strands – the strands are too small to be seen even with a normal microscope. Scientists use powerful equipment to see individual strands.

Learn how plants ‘drink’ water

What you need: celery stalks (with their leaves), glass or clear cup, water, food dye, camera.

• Fill the glass ¾ full with water and add 10 drops of food dye.
• Place a celery stalk into the glass of coloured water. Take a photograph of the celery.
• For two to three days, photograph the celery at the same time every day. Make sure you take a photograph at the very start of the experiment.

What happens and why?

All plants, such as celery, have vertical tubes that act like a transport system. These narrow tubes draw up water using a phenomenon known as capillarity.

Imagine you have a thin straw and you dip it into a glass of water. Have you ever noticed how the water climbs up the straw a little bit, even though you didn’t suck on it? This is because of capillarity.

In plants, capillarity helps move water from the roots to the leaves. Plants have tiny tubes inside them, like thin straws, called capillaries. The water sticks to the sides of these tubes and climbs up. In your experiment, you will see the food dye in the water make its way to the leaves.

Build a balloon-powered racecar

What you need: tape, scissors, two skewers, cardboard, four bottle caps, one straw, one balloon.

• Cut the cardboard to about 10cm long and 5cm wide. This will form the base of your car.
• Make holes in the centre of four bottle caps. These are your wheels.
• To make the axles insert the wooden skewers through the holes in the cap. You will need to cut the skewers to fit the width of the cardboard base, but leave room for the wheels.
• Secure the wheels to the skewers with tape.
• Attach the axles to the underside of the car base with tape, ensuring the wheels can spin freely.
• Insert a straw into the opening of a balloon and secure it with tape, ensuring there are no air leaks.
• Attach the other end of the straw to the top of the car base, positioning it so the balloon can inflate and deflate towards the back of the car. Secure the straw with tape.
• Inflate the balloon through the straw, pinch the straw to hold the air, place the car on a flat surface, then release the straw.

The inflated balloon stores potential energy when blown up. When the air is released, Newton’s third law of motion kicks into gear: for every action, there is an equal and opposite reaction.

As the air rushes out of the balloon (action), it pushes the car in the opposite direction (reaction). The escaping air propels the car forward, making it move across the surface.

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Grammar for Scientists: Navigating Sentence Structure in Chemistry Writing

by Blog Post Master | Feb 24, 2024 | Grammar content , Online education

As a chemist, it’s very important to know how to use the English language properly because clarity and accuracy are very important. You should know more than just the periodic table and complex reactions. You should also know how to write about your ideas, experiments, and findings. But why is sentence order so important in chemistry writing? How can scientists make sure their writing is correct and interesting?

The Building Blocks of Chemistry and Grammar

Let’s start by drawing a parallel between chemistry and grammar. In chemistry, molecules are structured in a specific way to ensure stability and functionality. Similarly, sentences have a structure that ensures clarity and coherence. A small change in the structure of a molecule can have a big effect on its traits. Similarly, a small mistake in the structure of a sentence can cause confusion. This comparison shows how important sentence order is for getting complicated ideas across clearly and correctly.

Effective communication skills are crucial for students, particularly those studying chemistry. Beyond mere clarity, good language proficiency plays a pivotal role in academic success. Just as chemists meticulously measure and combine chemicals for successful experiments, students must skillfully articulate their thoughts and understanding through writing. However, crafting well-structured and articulate prose can be challenging for some. If you find yourself struggling to find the right formula for your writing, seeking chemistry homework help from a professional writing service can be beneficial. These services not only aid in rectifying linguistic errors but also help elucidate complex concepts and processes in a clear and concise manner. Investing in such support not only enhances the quality of your chemistry homework but also fosters a deeper understanding of scientific writing principles.

The Formula for Effective Sentence Structure

Clarity is Key

In chemistry writing, the primary aim of sentence structure is to ensure clarity. Scientists strive to convey their ideas in a manner that is easily comprehensible, particularly when tackling intricate concepts. This often involves prioritizing the active voice over the passive voice. For example, one should avoid writing “The experiment was conducted by the researcher” and instead opt for “The researcher conducted the experiment.” Such a modification not only enhances the clarity of the sentence but also renders it more direct and engaging.

Embracing Simplicity

When it comes to sentence structure, simplicity reigns supreme. Long, convoluted sentences can confuse readers and obscure the main point. Breaking down complex ideas into shorter, more manageable sentences can enhance understanding. If you need to explain a complicated idea, you could use metaphors or examples to make it easier for the reader to understand.

The Role of Punctuation

Punctuation is a very important part of sentence form and, by extension, how easy it is to read chemistry writing. Your work will go more smoothly and be easier to understand if you use commas, semicolons, and periods in the right places. It’s easier for people to understand when there are commas and semicolons in the right places. Semicolons separate two lines that are connected but can stand on their own, which helps the flow of thought.

Avoiding Common Pitfalls

Overuse of Jargon

One common pitfall in chemistry writing is the overuse of jargon. It’s impossible to avoid using specialized language, but it’s important to balance it out with answers in simple language, especially when you’re writing for a larger audience. This approach not only makes your writing more accessible but also more engaging.

Consistency is Crucial

Consistency in tense and perspective is another critical aspect of sentence structure. Inconsistent use of tenses can confuse readers about the timeline of events or processes described. Similarly, shifting between first, second, and third person can disrupt the flow of the text. Maintaining consistency helps keep the reader grounded and focused on the content.

Engaging Your Audience

The power of rhetorical questions.

Incorporating rhetorical questions can be a powerful tool in engaging readers. These questions encourage readers to think more deeply about the topic and make the text more conversational and relatable. For example, asking “But what happens when a reaction doesn’t go as planned?” can pique the reader’s curiosity and keep them engaged.

Using Analogies and Metaphors

Using analogies and metaphors in chemistry writing can significantly enhance the comprehension and retention of abstract concepts. By likening complex chemical processes to familiar scenarios, students and researchers can create vivid and relatable images in the minds of their audience. For instance, envisioning a catalytic reaction as a matchmaker facilitating the meeting of two individuals can provide a tangible representation of the process at hand. This analogy not only simplifies the concept but also adds a layer of engagement, making it easier for readers to grasp and remember.

It’s not enough to just follow grammar rules when writing about chemistry. You also need to be able to explain difficult ideas in a way that is clear, interesting, and simple to grasp. To improve your chemistry writing, make sure it is clear, keep things simple, and use rhetorical questions, analogies, and metaphors to get people interested. Do not forget that good chemistry writing is all about making connections. These connections should be made not only between elements and molecules but also between the scientist writing the paper and the person reading it. You’ll be ready to write that hard chemistry paper now that you know these tips. Make sure that your work is understood and appreciated..

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Experiment in a Sentence  🔊

Definition of Experiment

an examination usually in a scientific nature that tests a proposed explanation

Examples of Experiment in a sentence

The scientists conducted an experiment on rats to determine if the new medication is safe for people.  🔊

Every chemistry class worked on the experiment to see if mixing the two chemicals would produce a liquid.  🔊

While captured by an evil militant group, the smart man put an experiment together using common supplies to knock a hole in the door.  🔊

The researcher’s experiment blew up in the lab causing thousands of dollars in damage.  🔊

Once the experiment was completed, the man knew it would discredit his hypothesis.  🔊

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[ noun ik- sper - uh -m uh nt ; verb ek- sper - uh -ment ]

a chemical experiment; a teaching experiment; an experiment in living.

a product that is the result of long experiment.

Synonyms: investigation , research

• Obsolete. experience .

verb (used without object)

to experiment with a new procedure.

• a test or investigation, esp one planned to provide evidence for or against a hypothesis: a scientific experiment
• the act of conducting such an investigation or test; experimentation; research

a poetic experiment

• an obsolete word for experience
• intr to make an experiment or experiments

/ ĭk-spĕr ′ ə-mənt /

• A test or procedure carried out under controlled conditions to determine the validity of a hypothesis or make a discovery.
• See Note at hypothesis

Derived Forms

• exˈperiˌmenter , noun

Other Words From

• ex·peri·menter ex·peri·mentor ex·peri·men·tator noun
• preex·peri·ment noun
• proex·peri·ment adjective
• reex·peri·ment verb (used without object) noun
• unex·peri·mented adjective

Word History and Origins

Origin of experiment 1

Synonym Study

Example sentences.

IBM hopes that a platform like RoboRXN could dramatically speed up that process by predicting the recipes for compounds and automating experiments.

The hope there is for improved sensitivity in searches for dark matter or experiments that might reveal some long-sought flaws in our standard model of particle physics.

The experiment represents early progress toward the possible development of an ultra-secure communications network beamed from space.

The new experiment represents, however, the first time scientists have applied machine learning to “validation,” a further step toward confirming results that involves additional statistical calculation.

At first, the sites amounted to experiments on the outer edges of the crypto universe, but in 2020 they have started to attract real money.

To put it rather uncharitably, the USPHS practiced a major dental experiment on a city full of unconsenting subjects.

If the noble experiment of American democracy is to mean anything, it is fidelity to the principle of freedom.

A classroom experiment seeks to demonstrate what it looks like.

This video, courtesy of BuzzFeed, tries a bit of an experiment to get some answers.

In the fall of 1992, Booker became a vegetarian “as an experiment,” he said, “and I was surprised by how much my body took to it.”

With Bacon, experientia does not always mean observation; and may mean either experience or experiment.

I made the experiment two years ago, and all my experience since has corroborated the conclusion then arrived at.

But this is quite enough to justify the inconsiderable expense which the experiment I urge would involve.

He commenced to experiment in electro-pneumatics in the year 1860, and early in 1861 communicated his discoveries to Mr. Barker.

Readers will doubtless be familiar with the well-known experiment illustrating this point.

Related Words

• examination
• experimentation
• observation
• undertaking

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Computer Science > Machine Learning

Title: bofire: bayesian optimization framework intended for real experiments.

Abstract: Our open-source Python package BoFire combines Bayesian Optimization (BO) with other design of experiments (DoE) strategies focusing on developing and optimizing new chemistry. Previous BO implementations, for example as they exist in the literature or software, require substantial adaptation for effective real-world deployment in chemical industry. BoFire provides a rich feature-set with extensive configurability and realizes our vision of fast-tracking research contributions into industrial use via maintainable open-source software. Owing to quality-of-life features like JSON-serializability of problem formulations, BoFire enables seamless integration of BO into RESTful APIs, a common architecture component for both self-driving laboratories and human-in-the-loop setups. This paper discusses the differences between BoFire and other BO implementations and outlines ways that BO research needs to be adapted for real-world use in a chemistry setting.

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Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them.

Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs .

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Japace 100+ Experiments Science Kit for Kids Age 4-12 Year Old, Cool Boy Christmas Birthday Gift Ideas, Chemistry and Physics Set Toys for Boys Girls

Surprising 100+ Experiments

Building Science

• 100+ COOLEST SCIENCE EXPERIMENTS FOR KIDS: Japace science kit conforms to stem projects that includes over 100 experiments - create fizzy reactions, underwater volcano, soap making, crystal growing tree, make wiggly worms, and more. When children play in these science experiments, they're creating all sorts of powerful cognitive anchors, may make science geeks out of your kids yet!
• LITTLE SCIENTIST IN THE MAKING: This 100+ piece set includes plenty of scientific lab tools like a beaker, measuring cups, test tubes, droppers, googles, gloves and more materials necessary to conduct over 100 cool and fun experiments, which encourage children to pretend and become real scientist.
• EASY TO FOLLOW & KEEP KIDS ENTERTAINED FOR AGES: The kit includes step-by-step instructions with photos that are easy to understand. I have a 5 year old daughter who loves to figure out how the world works so I sent this set to her as 5th birthday gift. She loves it and being entertained for ages. The great thing is that it is not only entertaining but also a learning experience all in one.
• COMPLETELY SAFE TO DEVELOP SCIENCE SKILLS AND CURIOSITY: Japace STEM toys conforms to US Toy Safety Requirements. It is a safe way for kids to learn scientific concepts and skills they can apply to everyday situations as they journey from childhood to adulthood: problem-solving, experimenting, decision-making, dealing with failure, gaining perspective, and persevering. Scientific principles are a framework for "how-to" navigate life.
• AN EDUCATIONAL GIFTS FOR CURIOUS LITTLE MINDS: This STEM set makes excellent gift ideas for Christmas, birthdays, summer boredom, school breaks, and weekend fun. The kids will get a good way to learn through play, and parents will get some quality science time in with kids, even grandparents can get in on the fun with using Japace science kits with the grandchildren.

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CONDUCT ICE CREAM MONSTORS

Simple but fun experiments -this is super coool to watch the foam slowly come out and erupt! It help kids build persistence and problem-solving skills as they figure out how to make the experiment a success.

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This experiment is aimed to improve kids' patience and observation skills. Kids can find the wonder of the world through watching the crystals growing gradually.

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It would be nice to have this kind of sand on the beach because the sand will never stick to your feet when they are wet. Let's explore why it is waterproof.

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Customers say

Customers like the organization, completeness, and quality of the science fundamentals kit. For example, they mention it's well organized, comes with almost everything needed to conduct the experiments, and makes a great gift. That said, they are satisfied with ease of use, and entertainment value.

AI-generated from the text of customer reviews

Customers are satisfied with the quality of the science fundamentals kit. They mention that it has lots of great experiments and contains all that is needed for each one. Some say that the kit is interesting and has some good experiments, while others say that it's awesome and has twenty plus experiments.

"...My favorite part are the true to life scientific equipment that’s included. A real buy!" Read more

"My grandson loved doing the experiments.Its a great educational product ." Read more

"This was a very nice kit for my grandson for activities for the summer...." Read more

"...This is a perfect science kit for 3 years old and up...." Read more

Customers find the instructions in the science fundamentals kit easy to understand and implement. They also say the experiments are fun and easy to follow. Customers also say it's convenient to have most everything they need in one place and that it explains everything well.

"...They love doing the experiments in them. So easy for her to do with some asistance...." Read more

" Easy to follow directions . Everything is included.The box is too small to store the contents after it has been opened" Read more

"...It pretty much has everything you need in the kit and the instructions are very clear . For what you’re paying for, it’s great value for the money...." Read more

"My 7 year old enjoys it. So far, experiments have been easy to set up and done with the kiddo after I come from work or after a busy day...." Read more

Customers find the science fundamentals kit entertaining with easy-to-follow experiments and great activities. They also say it's educational and keeps kids busy. Customers also mention it'll keep them interested for hours and is a perfect weekend night activity.

"...Was I wrong! The kit contains age appropriate, creative, fun , and interesting experiments...." Read more

"My daughter loves science and we have been loving this kit. It’s great for playdates and all her friends love it when they come over." Read more

"Great for kids, lot of learning and fun involved with this kit" Read more

" Granddaughter loves this easy and fun ." Read more

Customers find the science fundamentals kit complete with almost everything they need to conduct the experiments. They say it has easy-to-follow directions, plenty of materials, and lots of pieces. Some customers also say it's a good starter kit for kids ages 6-10.

"...So easy for her to do with some asistance. Comes with everything you need just need a couple around the house." Read more

"...It pretty much has everything you need in the kit and the instructions are very clear. For what you’re paying for, it’s great value for the money...." Read more

"...child, which is great! The kit includes nearly everything needed for all of the experiments (test tubes (and holder), beakers, droppers, red cabbage..." Read more

"...Was very impressed that truly comes with everything . Would highly recommend." Read more

Customers say the science fundamentals kit makes a great gift. They appreciate the kit items are packaged extremely well and the instructions are clear for each.

"...It would also make a gift ." Read more

"...Pros: The kit items are packaged extremely well and the instructions are clear for each experiment (102 total)...." Read more

"I attend A LOT of birthday parties and this is a perfect gift ...." Read more

"...She wants to do daily science experiments now 🥰 amazing gift , kit is well organized, well labeled and the box is an awesome caring case!..." Read more

Customers find the science fundamentals kit very catered to kids. They say it's great for young children, and keeps them interested and busy for hours. Some say the experiments are kid friendly, and adults supervision is a plus.

"...Was I wrong! The kit contains age appropriate , creative, fun, and interesting experiments...." Read more

"... Age appropriate and safe for kids " Read more

"We loved it! Lots to do and experiments were kid friendly !" Read more

" Great for kids , lot of learning and fun involved with this kit" Read more

Customers find the science fundamentals kit well organized and labeled nicely. They also say the materials are prepackaged in easy to find marked packages.

"...science experiments now 🥰 amazing gift, kit is well organized, well labeled and the box is an awesome caring case! Highly recommend to all parents!!!..." Read more

"...The materials come labeled and the instructions do a wonderful job explaining each experiment and providing clear instructions...." Read more

"...Most of the supplies are included and clearly labeled . We’ve had to provide vegetable oil and dish soap...." Read more

"...This one is the best! Twenty plus experiments, clearly organized materials , clear instruction book...." Read more

Customers find the science fundamentals kit worth the price.

"...For what you’re paying for, it’s great value for the money . It would also make a gift." Read more

"...Totally worth it for the price I paid." Read more

"...Im sure this is actually much less expensive than trying to put together a kit on your own." Read more

"...The experiments are fun, easy and some are repeatable. Worth the money . I would definitely recommend." Read more

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