When kids get to try out new concepts with hands-on activities, they really get into the learning. That’s why we’re such big fans of science experiments in the classroom or at home. This list of projects is perfect for helping your fifth grade science students explore biology, physics, chemistry, and a whole lot more. Let the learning begin!

1. Fly clothespin airplanes

Two planes built with clothespins (Fifth Grade Science)

Put your fifth grade science students’ engineering skills to the test. Provide them with clothespins and woodcraft sticks, and challenge them to build a realistic airplane. Bonus points if it can actually fly!

Learn more: STEAMsational

2. Demonstrate the “magic” leakproof bag

Man holding a zip top bag filled with water, with multiple pencils stuck through the bag

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

Learn more: Steve Spangler Science

3. Explore the science of glow sticks

Three clear glasses filled glowing liquids (Fifth Grade Science)

Glow sticks are always a big hit with kids, so they’ll have a terrific time learning about the chemical reactions that make them work.

Learn more: A Dab of Glue Will Do

4. Stop soil erosion with plants

Three soda bottle plants with containers set up to catch water and soil

Soil erosion is a serious problem, leading to natural disasters like landslides as well as causing problems for farmers, who lose valuable topsoil. Try this experiment to learn how plants help keep soil in place naturally.

Learn more: Life Is A Garden

5. Fill a bubble with dry ice vapor

Glass bowl with a large bubble filled with dry ice vapor sitting on a table (Fifth Grade Science)

Discover the science of sublimation by turning dry ice from a solid directly into a gas. Then play around with surface tension as the resulting vapor fills a giant bubble. This one is so cool to see in action!

Learn more: Wonder How To

6. Grow crystal snowflakes

Kids love crystal projects, and this one results in winter decorations for your classroom. Your students will learn about supersaturated solutions and crystallization. (See more winter science activities here.)

Learn more: Little Bins for Little Hands

7. Spin a candle carousel

Pinwheel mounted over a tin plate with four candles underneath (Fifth Grade Science)

Prove that hot air rises by using candles to spin a homemade pinwheel “carousel.” Then experiment to see how the number of candles affects the spinning speed.

Learn more: Science Buddies

8. Escape from quicksand

Can of cornstarch next to a dish filled with a white liquid cornstarch mixture with a small plastic frog on top

Dive deep into the science of quicksand and learn about saturation and friction along the way. You’ll create a small “quicksand” pool from cornstarch and water, then experiment to find out the best ways to escape.

Learn more: Education.com

9. Write in invisible ink

Flashlight shining on piece of paper with lines written in both regular and invisible ink (Fifth Grade Science)

Kids will love swapping secret messages with their friends in this acid-base science project. Mix the water and baking soda and use a paintbrush to write a message. Then use grape juice to expose the message or hold it up to a heat source.

Learn more: ThoughtCo

10. Set off a chain reaction

Colorful wood craft sticks flying into the air from a table

Learn about potential and kinetic energy when you try this cool fifth grade science experiment. All you need are wood craft sticks and a bit of patience.

Learn more: Steve Spangler Science

11. Play catch with a catapult

Plastic cups and pencils turned in a catapult launcher and catching cup (Fifth Grade Science)

This take on a classic fifth grade science project challenges young engineers to build a catapult from basic materials. The twist? They also must create a “receiver” to catch the soaring object on the other end.

Learn more: Science Buddies

12. Find out if water conducts electricity

Two alligator clips holding a lit LED with a cup of water in the background (Fifth Grade Science)

We always tell kids to get out of the water as a storm approaches. This 5th grade science project helps explain why.

Learn more: Rookie Parenting

13. Bounce on a trampoline

Miniature trampoline built from wood craft sticks, rubber bands, and fabric (Fifth Grade Science)

Kids love bouncing on trampolines, but can they build one themselves? Find out with this totally fun STEM challenge. Plus, check out more fifth grade STEM challenges here!

Learn more: Teach Student Savvy

14. Float a marker man

Animated GIF showing a hand moving a dry erase marker man around the surface of a plate of water

Kids’ 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: Gizmodo

15. Build a solar oven

Solar ovens built from pizza boxes, with marshmallows, chocolate, and graham crackers (Fifth Grade Science)

Learn about the value of solar energy by building an oven that cooks food without electricity. Enjoy your tasty treats while discussing ways we can harness the energy of the sun and why alternative energy sources are important. (Love edible science projects? Get more ideas here.)

Learn more: Desert Chica

16. Launch your own bottle rocket

Rocket built from plastic bottle attached to a bike pump

Blast off with a few supplies and a little help from the laws of motion. Encourage kids to design and decorate their rockets first and see which one can fly the highest!

Learn more: Science Sparks

17. Build a snack machine

Candy dispensing machine made from recycled materials

Incorporate everything students learn about simple machines into one project when you challenge them to build a snack machine! Using basic supplies, they’ll need to design and construct a machine that delivers snacks from one location to another. (Get more candy experiments here.)

Learn more: Left Brain Craft Brain

18. Explode a soda geyser

Students looking surprised and running away as foam geysers explode from soda bottles (Fifth Grade Science)

Kids never seem to tire of this messy project involving diet soda and Mentos candy. You’ll need a big open area to conduct this experiment, which teaches kids about gas molecules and surface tension.

Learn more: Steve Spangler Science

19. Watch the heart beat with marshmallows

Fifth grade science student with a marshmallow with a toothpick resting on their upturned wrist

If you can get your fifth grade science class to quiet down enough for this one, they might be able to see a marshmallow jump with each beat of their heart!

Learn more: Growing Grade by Grade

20. Discover the delights of decomposition

Test tubes holding pieces of food sitting on a worksheet labeled Observation Log

This is a good chance to apply the scientific method and practice your observation skills, using only basic kitchen supplies. Ask the question, “Which food will rot (decompose) the fastest?” Have students hypothesize, observe, and then report their findings. Get a printable observation sheet at the link below.

Learn more: No Time for Flash Cards

21. Mix up some magic sand

Glass jar filled with wet sand in various colors

What if you could make sand that was “afraid” of water? This 5th grade science experiment uses waterproofing spray to create you-gotta-see-it-to-believe-it hydrophobic sand.

Learn more: Teaching Mama

22. Make your own bouncy balls

Student's hand bouncing colorful homemade balls (Fifth Grade Science)

Here’s another use for that borax you bought for making slime: homemade bouncy balls! Students learn about polymers as they mix borax with cornstarch, glue, and water in this playful experiment.

Learn more: Babble Dabble Do

23. Make a foil bug walk on water

Aluminum foil bug floating on a bowl of water

Surface tension allows water striders to dance across the surface of the water. Re-create this scientific phenomenon with little “bugs” made of aluminum foil.

Learn more: The Homeschool Scientist

24. Assemble Archimedes’ screw

PVC pipe with rubber tubing twisted around it, with each end in a bowl of colored water (Fifth Grade Science)

It’s amazing how often science looks like magic–until you understand the principles behind it. Such is the case with the simple pump known as Archimedes’ screw. Learn how it works and how to build one with your class at the link below.

Learn more: Science Buddies

25. Find out how bile breaks down fat

Cotton ball sitting on a bowl of milk swirled with food colors

Learning about the digestive system? This 5th grade science demo explores the purpose of the bile produced by the liver, which breaks down fat.

Learn more: Simple Southern

26. Blow up a balloon—without blowing

Two water bottles with inflated balloons attached to the openings (Fifth Grade Science)

This is the classic science experiment that helps you teach 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: All for the Boys

27. Use rubber bands to sound out acoustics

Plastic cup with rubber bands stretched across the opening

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

Learn more: Science Sparks

28. Study water filtration

Child pouring dirty water into a cup sitting on top of a large mason jar (Fifth Grade Science)

See the process of water purification firsthand. Layer coffee filters, sand, and gravel in the bottom of an empty cup punched with holes. Place the cup in an empty jar, pour in dirty water, and watch what happens.

Learn more: Teach Beside Me

29. Discover density with hot and cold water

Mason jars stacked with their mouths together, with one color of water on the bottom and another color on top

There are a lot of cool science experiments you can do with density. This one is extremely simple, involving only hot and cold water and food coloring.

Learn more: STEAMsational

30. Learn to layer liquids

Clear cylindrical vase layered with different colored 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. Your 5th grade science students will be amazed when the liquids float one on top of the other like magic (except it is really science).

Learn more: Steve Spangler Science

31. Light(ning) it up indoors

Foil covered plastic fork with piece of foil and rubber glove on a wood board

On a cool, low-humidity day, use a foil-covered fork and a balloon to create a “lightning storm” in your classroom. Turn down the lights to give students a better view of the static electricity you’re creating.

Learn more: Education.com

32. Find out if a dog’s mouth is cleaner than a human’s

Dog with its mouth open and filled with treats (Fifth Grade Science)

Settle an age-old debate with this 5th grade science project. Collect saliva (from both humans and canines) with cotton swabs and place each sample in labeled Petri dishes. Check the bacterial colonies in each and compare the results.

Learn more: Sciencing

33. Recycle newspaper into an engineering challenge

Students balancing a textbook on top of a pyramid of rolled up newspaper

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

Learn more: STEM Activities for Kids

34. Preserve apple slices

Apple cut in half, beginning to turn brown and dry out (Fifth Grade Science)

Investigate oxidation and enzymes by determining which food preservation methods work best on apple slices. This observational project is a simple way to apply the scientific method in the classroom.

Learn more: Science Buddies

35. Explore basic genetics

Worksheet labeled Family Genetic Trait Chart

Send your students on a quest to find out more about their genes and inherited traits. The link below includes a printable chart they can use to learn about recessive and dominant genes.

Learn more: Education.com

36. Design a biosphere

Miniature biosphere made with plastic wrap

This project really brings out kids’ creativity and helps them understand that everything in a biosphere is really part of one big whole. You’ll be overwhelmed by what they come up with!

Learn more: Laney Lee

37. Create convection currents

Water dropper adding blue water to a jar of clear water with ice (Fifth Grade Science)

This easy experiment uses hot and cold liquids and some food coloring to explore the thermal and kinetic energy that creates convection currents. Take things a step further and research how convection currents work in large bodies of water, like oceans.

Learn more: Education.com

38. Sink or swim with soda cans

Large plastic bin filled with water, with two soda cans floating and two sunk at the bottom

Here’s another easy density experiment. Place unopened cans of regular and diet soda into a bin of water to see which float and which sink. The differences are due to the use of sugar and artificial sweeteners.

Learn more: Cool Science Experiments HQ

39. Construct a homemade lava lamp

Soda bottle filled with blue liquid floating in globules (Fifth Grade Science)

This 70s trend is back—as a 5th grade science project! Learn about acids and bases while putting together a totally groovy lava lamp.

Learn more: Education.com

40. Whip up a tornado in a bottle

Upside-down bottle of water with a tornado spiraling inside

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

Learn more: Cool Science Experiments HQ

Continue the STEM learning with these Fifth Grade Math Games for Teaching Fractions, Decimals, and More.

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40 Fifth Grade Science Projects That Will Blow Your Students' Minds