year 7 science experiments

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Teaching Students About Minotaur

Teaching students about abolition, protected: students grapple with weight of achievement pressure, finishing what was started: how going back to school can reap major rewards, from platforms to ecosystems: a paradigm shift for modern learning organisations, u.s. parents increase funding and saving for children’s higher education, says college savings foundation’s 18th annual survey, are too many students going to university this year, oregon high school seniors closing federal student aid gap, fostering a new era of success: cultivating black male educators to propel student achievement, geoffrey hinton to discuss future and risks of ai at college’s ontario’s 2024 higher education summit, 43 of the best 7th grade science projects and experiments.

Are you looking for science activities to do with your 7 th graders? No sweat. We have you covered. Check out our list of 43 science projects and experiments that you can try with your 7th graders this month.

• Yeast Metabolism with and without Aeration | Sciencebuddies.org – Grades 6-8 Biology experiment that evaluates the effects of glucose metabolism in yeast.
• Aspirin Absorption in Carbohydrate Solutions | All-Science-Fair-Projects.com – Grades 6-8, Does aspirin absorb into the bloodstream quicker if taken with a carbohydrate food? Test aspirin dissolution in an assortment of carbohydrate solutions.
• Bacteria and Toothpaste | All-Science-Fair-Projects.com – Grades 6-8, Do you know which toothpaste cleans your teeth best? In this project, you will row bacteria from your recently brushed teeth in petri dishes to find out the answer.
• Making Batteries from Fruits and Vegetables | Sciencebuddies.org – Grades 4-7, Use veggie power to build a simple battery from a variety of vegetables. Which ones are the most powerful?
• How Do Roots Grow When the Direction of Gravity Changes? | ScienceBuddies.org -Grades 6-10, Plants respond to gravity by stems that grow upward and roots that grow downward. Experiment with germinating seeds and rotate them to make up down and down up. How do you think the growing seedlings will respond?
• Hydroponics vs. Soil Growth | All-Science-Fair-Projects.com – Grades 6-8, In this project, students find out if plants grow better in soil or a hydroponic solution.
• Puppy Proportions: Your Dog’s Early Months | Sciencebuddies.org – Grades 6-8, Find out how a puppy’s weight, growth, and proportions change early in their lives.
• Do Migratory Birds Like It Hot? | Sciencebuddies.org – Grades 6-8, Pick a species of bird and determine if there is a correlation between air temperature and where and when the birds migrate.
• That’s a Real Smile! …or is it? | ScienceBuddies.org – Grades 6-8, Can people tell the difference between a fake smile and a real one? Gather information from dozens of volunteers to find out.
• Build a Raft Powered by Surface Tension | Sciencebuddies.org – Grades 6-10, Learn about the properties of surface water tension, and use it to propel a raft.
• Paw Preference in Pets | Sciencebuddies.org – Grades 7-10, Are animals left-handed or right-handed like humans?
• Bat Detector: Listen to the Secret Sounds of Bats | Sciencebuddies.org – Grades 7-10, Study the behavior of bats to find out how do they use echolocation to catch their prey
• Saving Migratory Animals | ScienceBuddies.org – Grades 7-10, They’re here today but could be gone tomorrow. Examine the migratory path of a bird species and the similarities and differences between their winter and summer habitats. Recommend which locations should be preserved to protect these species.
• Which Metal Is the Most Resistant to Corrosion? | Sciencebuddies.org – Grades 6-8, Test several kinds of metal exposed to the air, tap water, and saltwater to determine which are the most resistant to corrosion, and which substances are the most corrosive to them.
• Ionizing vs. Photoelectric Smoke Detectors | All-Science-Fair-Projects.com – Grades 6-8, Learn how smoke detectors work, and compare the effectiveness of ionizing smoke detectors to photoelectric smoke detectors.
• Robot Movement | Education.com – Grades 6-8, Construct a robot equipped with sound/touch sensor circuitry. Run it through a maze to find out if it displays sequential or random movement.
• Repurposed Designs | Education.com – Grades 6-8, Identify items that need repurposing such as e-waste, batteries, and mattresses. Then get creative and Invent your own original repurposed design.
• Solar-Powered Robot Bug | Sciencebuddies.org – Grades 6-8, Explore electronics and solar energy by building the Frightened Grasshopper, a solar-powered bug.
• Stressed Out with Beams | Sciencebuddies.org – Grades 6-8, Test the load-bearing capacity of several types of beams, including I-beams, U-beams, rectangular beams, and T-beams.
• Build a Gauss Rifle | ScienceBuddies.org – Grades 6-8, Use magnets and ball bearings to build a rifle based on magnetism. Investigate how many magnet and ball bearing “stages” affect the velocity and distance of the projectile.
• Smart Medicine Cabinet | ScienceBuddies.org – Grades 6-8, Do you know someone who needs to take medication daily? Create a sensor that reminds patients when to take their medication.
• electromagnet?
• Grow the Best and the Largest Crystals | Sciencebuddies.org – Grades 6-8, Figure out the best temperature for making the largest, purest crystals using water and borax.
• What’s the Fastest Way to Cool a Soda? | ScienceBuddies.org – Grades 6-8, Experiment with different ways to cool a can of soda.  Find out the fastest way to get your tall cold drink.
• How Much Potential Energy Do Different Nuts Have? | Education.com – Grades 6-8, Explore the energy of living things. Prove that different varieties of nuts produce electricity in a series of experiments.
• How Salty Does the Sea Have to Be for an Egg to Float? | ScienceBuddies.org – Grades 6-8, Figure out precisely what concentration of salt in water is required to make an egg float.
• Washing Detergent & Hydrophobic Soil | Education.com – Grades 6-8, Some soils do not absorb water very well.  Find out why and if washing detergent and change their ability to absorb water.
• Make Your Own Psychrometer | Sciencebuddies.org – Grades 6-8, Make a psychrometer to measure relative humidity, then use it to measure RH in a variety of weather conditions.
• Do Our Storm Drains Keep the Ocean Trash Free? | ScienceBuddies.org – Grades 6-8, Test your local grated storm drain inlets to see if they’re up to the task of keeping plastic litter out of your community’s stormwater drainage system. If they’re not, work on improving the design.
• Can Water Float on Water? | ScienceBuddies.org – Grades 6-8, Can liquid water float on liquid water? Investigate how the density of water is affected by its temperature and salinity.
• What Weather Factors Create Radiation Fog? | Sciencebuddies.org – Grades 6-8, Make systematic observations about the weather conditions needed to create radiation fog. Can you forecast when and where it will occur?
• The Science Behind Tsunamis | Sciencebuddies.org – Grades 6-8, Study the effect of water depth on wave velocity. Learn how tsunamis form and create your own simulation model wave tank to generate a tsunami.
• Killing ‘Vampires’: Saving Money and Power | Sciencebuddies.org – Grades 6-8, In this project, you’ll identify electricity “vampires” in your home, such as computer peripherals and electronic equipment, that use power even when not in use. Find out exactly how much energy they use. Use this eye-opening data to help your family save money on electricity.
• Which Wheels Work Best? | Education.com – Grades 6-9, Experiment with how different kinds of wheels affect the speed of a skateboard.  You’ll calculate friction co-efficient and its correlation to velocity.
• Test the Efficiency of a Solar Cell? | Education.com – Grades 6-9, Find out how much of the energy from the sun that reaches a photovoltaic cell is changed over into electricity.  Predict how to position solar cells for maximum conversion.
• How Acidic Waters Make Rocks Disappear | Sciencebuddies.org – Grades 6-10, Soak some limestone rocks in varying amounts of acidic water.  Determine how much acidity is needed to make them dissolve.
• Seafloor Spreading | Education.com – Grades 6-12, Use an oatmeal box and some paper to demonstrate seafloor spreading.
• Storytelling Alice | Sciencebuddies.org – Grades 6-12, Create your own computer-animated story using Carnegie Mellon’s 3D programming software. You’ll learn computer programming with easy-to-use drag and drop tools.
• Modeling Darcy’s Law | Education.com – Grades 6-12, Model the underground movement of water, utilizing Darcy’s Law.
• Globular Clusters | Sciencebuddies.org – Grades 7-10, Explore “star gangs” in the Milky Way and beyond. Globular cluster are compact groups of about a million stars that move around in galaxies. Use statistical data to learn how globular clusters help us better understand the universe.
• Demonstrating the Separation of Mixtures | Education.com – Grades 7-10, Separate recycled objects to illustrate how mixtures are created.
• Customize Your Own Drum Set! | ScienceBuddies.org – Grades 7-10, Build a drum set using household materials, a computer, Scratch, and a PicoBoard. Program your drum set to create a synthesized Hip hop, rap, classical, techno, or electronic drumbeat.
• Harmful Algal Blooms in the Chesapeake Bay | Sciencebuddies.org – Grades 8-12, Harmful algal blooms affect the quality of water and impact people, marine animals, and birds. Study how water quality changes before, during, and after algal blooms.

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72 Easy Science Experiments Using Materials You Already Have On Hand

Because science doesn’t have to be complicated.

If there is one thing that is guaranteed to get your students excited, it’s a good science experiment! While some experiments require expensive lab equipment or dangerous chemicals, there are plenty of cool projects you can do with regular household items. We’ve rounded up a big collection of easy science experiments that anybody can try, and kids are going to love them!

Easy Chemistry Science Experiments

Easy physics science experiments, easy biology and environmental science experiments, easy engineering experiments and stem challenges.

1. Taste the Rainbow

Teach your students about diffusion while creating a beautiful and tasty rainbow! Tip: Have extra Skittles on hand so your class can eat a few!

Learn more: Skittles Diffusion

2. 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

3. Make a volcano erupt

This classic experiment demonstrates a chemical reaction between baking soda (sodium bicarbonate) and vinegar (acetic acid), which produces carbon dioxide gas, water, and sodium acetate.

Learn more: Best Volcano Experiments

4. Make elephant toothpaste

This fun project uses yeast and a hydrogen peroxide solution to create overflowing “elephant toothpaste.” Tip: Add an extra fun layer by having kids create toothpaste wrappers for plastic bottles.

5. 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

6. Demonstrate the “magic” leakproof bag

All you need is a zip-top plastic bag, sharp pencils, and 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

7. 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. Have them record their observations.

Learn more: Apple Oxidation

8. 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

9. 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

10. 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

11. 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

12. Mix up some slime

Tell kids you’re going to make slime at home, and watch their eyes light up! There are a variety of ways to make slime, so try a few different recipes to find the one you like best.

13. 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

14. 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

15. 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

16. 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!

17. 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

18. 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

19. Pull an egg into a bottle

This classic easy science experiment never fails to delight. Use the power of air pressure to suck a hard-boiled egg into a jar, no hands required.

Learn more: Egg in a Bottle

20. Blow up a balloon (without blowing)

Chances are good you probably did easy science experiments like this when you were in school. The baking soda and vinegar balloon experiment demonstrates the reactions between acids and bases when you fill a bottle with vinegar and a balloon with baking soda.

21 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.

22. 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

23. 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.

24. 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.

25. 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

26. Create dancing popcorn

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.

27. 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: Soda Explosion

28. Send a teabag flying

Hot air rises, and this experiment can prove it! You’ll want to supervise kids with fire, of course. For more safety, try this one outside.

Learn more: Flying Tea Bags

29. Create magic milk

This fun and easy science experiment demonstrates principles related to surface tension, molecular interactions, and fluid dynamics.

Learn more: Magic Milk Experiment

30. Watch the water rise

Learn about Charles’s Law with this simple experiment. As the candle burns, using up oxygen and heating the air in the glass, the water rises as if by magic.

Learn more: Rising Water

31. Learn about capillary action

Kids will be amazed as they watch the colored water move from glass to glass, and you’ll love the easy and inexpensive setup. Gather some water, paper towels, and food coloring to teach the scientific magic of capillary action.

Learn more: Capillary Action

32. Give a balloon a beard

Equally educational and fun, this experiment will teach kids about static electricity using everyday materials. Kids will undoubtedly get a kick out of creating beards on their balloon person!

Learn more: Static Electricity

33. Find your way with a DIY compass

Here’s an old classic that never fails to impress. Magnetize a needle, float it on the water’s surface, and it will always point north.

Learn more: DIY Compass

34. Crush a can using air pressure

Sure, it’s easy to crush a soda can with your bare hands, but what if you could do it without touching it at all? That’s the power of air pressure!

35. Tell time using the sun

While people use clocks or even phones to tell time today, there was a time when a sundial was the best means to do that. Kids will certainly get a kick out of creating their own sundials using everyday materials like cardboard and pencils.

Learn more: Make Your Own Sundial

36. Launch a balloon rocket

Grab balloons, string, straws, and tape, and launch rockets to learn about the laws of motion.

37. Make sparks with steel wool

All you need is steel wool and a 9-volt battery to perform this science demo that’s bound to make their eyes light up! Kids learn about chain reactions, chemical changes, and more.

Learn more: Steel Wool Electricity

38. Levitate a Ping-Pong ball

Kids will get a kick out of this experiment, which is really all about Bernoulli’s principle. You only need plastic bottles, bendy straws, and Ping-Pong balls to make the science magic happen.

39. Whip up a tornado in a bottle

There are plenty of versions of this classic experiment out there, but we love this one because it sparkles! Kids learn about a vortex and what it takes to create one.

Learn more: Tornado in a Bottle

40. Monitor air pressure with a DIY barometer

This simple but effective DIY science project teaches kids about air pressure and meteorology. They’ll have fun tracking and predicting the weather with their very own barometer.

Learn more: DIY Barometer

41. Peer through an ice magnifying glass

Students will certainly get a thrill out of seeing how an everyday object like a piece of ice can be used as a magnifying glass. Be sure to use purified or distilled water since tap water will have impurities in it that will cause distortion.

Learn more: Ice Magnifying Glass

42. String up some sticky ice

Can you lift an ice cube using just a piece of string? This quick experiment teaches you how. Use a little salt to melt the ice and then refreeze the ice with the string attached.

Learn more: Sticky Ice

43. “Flip” a drawing with water

Light refraction causes some really cool effects, and there are multiple easy science experiments you can do with it. This one uses refraction to “flip” a drawing; you can also try the famous “disappearing penny” trick .

Learn more: Light Refraction With Water

44. Color some flowers

We love how simple this project is to re-create since all you’ll need are some white carnations, food coloring, glasses, and water. The end result is just so beautiful!

45. Use glitter to fight germs

Everyone knows that glitter is just like germs—it gets everywhere and is so hard to get rid of! Use that to your advantage and show kids how soap fights glitter and germs.

Learn more: Glitter Germs

46. Re-create the water cycle in a bag

You can do so many easy science experiments with a simple zip-top bag. Fill one partway with water and set it on a sunny windowsill to see how the water evaporates up and eventually “rains” down.

Learn more: Water Cycle

47. Learn about plant transpiration

Your backyard is a terrific place for easy science experiments. Grab a plastic bag and rubber band to learn how plants get rid of excess water they don’t need, a process known as transpiration.

Learn more: Plant Transpiration

48. Clean up an oil spill

Before conducting this experiment, teach your students about engineers who solve environmental problems like oil spills. Then, have your students use provided materials to clean the oil spill from their oceans.

Learn more: Oil Spill

49. Construct a pair of model lungs

Kids get a better understanding of the respiratory system when they build model lungs using a plastic water bottle and some balloons. You can modify the experiment to demonstrate the effects of smoking too.

Learn more: Model Lungs

50. Experiment with limestone rocks

Kids  love to collect rocks, and there are plenty of easy science experiments you can do with them. In this one, pour vinegar over a rock to see if it bubbles. If it does, you’ve found limestone!

Learn more: Limestone Experiments

51. Turn a bottle into a rain gauge

All you need is a plastic bottle, a ruler, and a permanent marker to make your own rain gauge. Monitor your measurements and see how they stack up against meteorology reports in your area.

Learn more: DIY Rain Gauge

52. Build up towel mountains

This clever demonstration helps kids understand how some landforms are created. Use layers of towels to represent rock layers and boxes for continents. Then pu-u-u-sh and see what happens!

Learn more: Towel Mountains

53. Take a play dough core sample

Learn about the layers of the earth by building them out of Play-Doh, then take a core sample with a straw. ( Love Play-Doh? Get more learning ideas here. )

Learn more: Play Dough Core Sampling

54. Project the stars on your ceiling

Use the video lesson in the link below to learn why stars are only visible at night. Then create a DIY star projector to explore the concept hands-on.

Learn more: DIY Star Projector

55. Make it rain

Use shaving cream and food coloring to simulate clouds and rain. This is an easy science experiment little ones will beg to do over and over.

Learn more: Shaving Cream Rain

56. Blow up your fingerprint

This is such a cool (and easy!) way to look at fingerprint patterns. Inflate a balloon a bit, use some ink to put a fingerprint on it, then blow it up big to see your fingerprint in detail.

57. Snack on a DNA model

Twizzlers, gumdrops, and a few toothpicks are all you need to make this super-fun (and yummy!) DNA model.

Learn more: Edible DNA Model

58. Dissect a flower

Take a nature walk and find a flower or two. Then bring them home and take them apart to discover all the different parts of flowers.

59. Craft smartphone speakers

No Bluetooth speaker? No problem! Put together your own from paper cups and toilet paper tubes.

Learn more: Smartphone Speakers

60. Race a balloon-powered car

Kids will be amazed when they learn they can put together this awesome racer using cardboard and bottle-cap wheels. The balloon-powered “engine” is so much fun too.

Learn more: Balloon-Powered Car

61. Build a Ferris wheel

You’ve probably ridden on a Ferris wheel, but can you build one? Stock up on wood craft sticks and find out! Play around with different designs to see which one works best.

Learn more: Craft Stick Ferris Wheel

62. Design a phone stand

There are lots of ways to craft a DIY phone stand, which makes this a perfect creative-thinking STEM challenge.

63. Conduct an egg drop

Put all their engineering skills to the test with an egg drop! Challenge kids to build a container from stuff they find around the house that will protect an egg from a long fall (this is especially fun to do from upper-story windows).

Learn more: Egg Drop Challenge Ideas

64. Engineer a drinking-straw roller coaster

STEM challenges are always a hit with kids. We love this one, which only requires basic supplies like drinking straws.

Learn more: Straw Roller Coaster

65. Build a solar oven

Explore the power of the sun when you build your own solar ovens and use them to cook some yummy treats. This experiment takes a little more time and effort, but the results are always impressive. The link below has complete instructions.

Learn more: Solar Oven

66. Build a Da Vinci bridge

There are plenty of bridge-building experiments out there, but this one is unique. It’s inspired by Leonardo da Vinci’s 500-year-old self-supporting wooden bridge. Learn how to build it at the link, and expand your learning by exploring more about Da Vinci himself.

Learn more: Da Vinci Bridge

67. Step through an index card

This is one easy science experiment that never fails to astonish. With carefully placed scissor cuts on an index card, you can make a loop large enough to fit a (small) human body through! Kids will be wowed as they learn about surface area.

68. Stand on a pile of paper cups

Combine physics and engineering and challenge kids to create a paper cup structure that can support their weight. This is a cool project for aspiring architects.

Learn more: Paper Cup Stack

69. Test out parachutes

Gather a variety of materials (try tissues, handkerchiefs, plastic bags, etc.) and see which ones make the best parachutes. You can also find out how they’re affected by windy days or find out which ones work in the rain.

Learn more: Parachute Drop

70. Recycle newspapers into an engineering challenge

It’s amazing how a stack of newspapers can spark such creative engineering. Challenge kids to build a tower, support a book, or even build a chair using only newspaper and tape!

Learn more: Newspaper STEM Challenge

71. Use rubber bands to sound out acoustics

Explore the ways that sound waves are affected by what’s around them using a simple rubber band “guitar.” (Kids absolutely love playing with these!)

Learn more: Rubber Band Guitar

72. Assemble a better umbrella

Challenge students to engineer the best possible umbrella from various household supplies. Encourage them to plan, draw blueprints, and test their creations using the scientific method.

Learn more: Umbrella STEM Challenge

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