Middle schoolers love science! These hands-on middle school science experiments can be completed in the classroom or at home, whether you’re exploring viscosity, density, liquids, solids, and so much more. Below you’ll find a great list of middle school science activities and experiments, including 7th grader science fair project ideas to get you started. 


What is Middle School Science?

Are you looking for cool science experiments for kids that also offers a valuable opportunity to learn basic chemistry, physics, and earth science concepts? With simple ingredients and basic materials, your middle school students will have a blast with these easy science experiments.

You’ll find that just about every science experiment on the list below uses supplies you can easily find around the house or classroom or are quick and easy to pick up at the supermarket.

Mason jars, empty plastic bottles, baking soda, salt, vinegar, zip-top bags, rubber bands, glue, hydrogen peroxide, food coloring (always fun but optional), and various other common ingredients make science accessible to everyone!

Explore chemical reactions to simple machines, surface tension, gravity, buoyancy, and more with various science experiments, demonstrations, and activities.

Printable Science and STEM Packs

For a comprehensive guide to all of our science and STEM projects, make sure to look at these guides to get started today.

Free Science Challenge Calendar Guide

Also, download our free printable 12 Days of Science Challenge to get started!


Try These Science Experiments for Middle Schoolers

Grab a pen and make a list! Everything you need for educational and fun science is right here.

At the end of this huge list, you’ll find more science resource guides such as vocabulary words, book choices, and information on the science process!


Make simple airfoils and explore air resistance.


What happens when you drop alka seltzer tablets into oil and water? This type of experiment explores both physics and chemistry. You can even look at the emulsification concept while at it.

Lava Lamp Experiment


Get ready for some fun with this Alka Seltzer Rocket. Easy to set up and simple to do, it is chemistry in action!


How do you keep apples from turning brown? Do all apples turn brown at the same rate? Answer these burning apple science questions with an apple oxidation experiment.


Archimedes’ screw, is one of the earliest machines used for moving water from a lower area to a higher area. Make an Archimedes screw that uses cardboard and a water bottle to create a machine to move cereal!


Atoms are tiny but very important building blocks of everything in our world. What are the parts of an atom?

Build an Atom


Also try our soda balloon experiment.


How do whales stay warm in very cold water? Test out how blubber works as an insulator with this fun science experiment.


There’s nothing better than a baking soda and vinegar reaction when it comes to science experiments, and it is great for a variety of ages including middle schoolers. While a bit messy, it’s a fantastic opportunity to explore mixtures, states of matter, and basic chemistry.



Explore how re cabbage can be used to test liquids of varying acid levels. Depending on the pH of the liquid, the cabbage turns various shades of pink, purple, or green! It’s incredibly cool to watch, and kids love it!

CELLS (Animals and Plants)

Learn about the unique structures that make up plant and animal cells with these two free, hands-on STEAM projects.


Take a sweet treat and apply science to it. There are a variety of ways you can experiment and explore candy for physics fun!


Love exploding experiments?  YES!! Well here’s another one the kids are sure to love except this one is an imploding or collapsing experiment! Learn about atmospheric pressure with this incredible can crusher experiment.



Can you make corn dance? Explore a simple chemical reaction, with the addition of corn kernels. Also try it with raisins or cranberries!


Turn on your favorite tunes and make colorful sprinkles dance! Explore sound and vibrations when you try this fun dancing sprinkles experiment.


Learn what a compass is and how a compass works, as you make your own homemade compass. All you need are a few simple materials to get started.


Usually, you can’t see DNA except with a high-powered microscope. But with this strawberry DNA extraction experiment, you can get the DNA strands to release from their cells and bind together into a format that’s visible with the naked eye.

YOU MAY ALSO LIKE: Build a Candy DNA Model


Take the egg drop challenge as you investigate what makes for the best shock absorber for dropping an egg without it breaking on impact.


Can you make an egg bounce? Find out with this chemical reaction, of an egg in vinegar.


Explore an exothermic chemical reaction with hydrogen peroxide and yeast.



Create a dry-erase drawing and watch it float in water.


Grab some rice and a bottle, and let’s find out what happens when you put a pencil in the mix!  Do you think you can lift a bottle of rice with a pencil? Try this fun friction experiment and find out.

Floating Rice

Green Pennies Experiment

Why is the Statue of Liberty green? It’s a beautiful patina, but how does it happen? Explore the science in your own kitchen or classroom by making green pennies.

Growing Crystals

There are several ways to explore super saturated solutions and grow crystals. Featured below is the traditional growing borax crystals science experiment. However, you can also grow edible sugar crystals or check out how to grow salt crystals. All three chemistry experiments are cool for kids!


Heart Model

Use this heart model project for a hands-on approach to anatomy. You only need a few simple supplies and very little prep to make this fun heart pump model.

Invisible Ink

Write a message that no one else can see until the ink is revealed with your own invisible ink! Cool chemistry that’s perfect to do at home or in the classroom. Compare it with a different type of invisible ink with cranberry secret messages.

Liquid Density Experiment

This fun liquid density experiment explores how some liquids are heavier or denser than others.

Lemon Battery

What can you power with a lemon battery? Grab some lemons and a few other supplies, and find out how you can make lemons into lemon electricity!

Lung Model

Learn how our amazing lungs work, and even a bit of physics with this easy balloon lung model. 

Magic Milk

The chemical reaction in this magic milk experiment is fun to watch and makes for great hands-on learning.

Melting Ice Experiment

What makes ice melt faster? Investigate with a fun ice melting experiment that kids are sure to enjoy. Plus, try an icy STEM challenge.

Mentos and Coke

Here’s another fizzing experiment kids are sure to love! All you need are Mentos and Coke. It’s not a chemical reaction taking place like you might think.

Milk and Vinegar

Transform a couple of common kitchen ingredients into a moldable, durable piece of a plastic-like substance. Make plastic milk with a chemical reaction.

Oil Spill Experiment

Apply science to the care and protection of the environment with this oil spill demonstration. Learn about an oil spill and investigate the best ways to clean it up.

Penny Boat Challenge and Buoyancy

Design a simple tin foil boat, and see how many pennies it can hold before it sinks.  How many pennies will it take to make your boat sink? Learn about simple physics while you test out your engineering skills.

Pepper and Soap Experiment

Sprinkle some pepper in water and make it dance across the surface. Explore surface tension of water when you try this pepper and soap experiment.

Pop Rocks and Soda

Pop rocks is a fun candy to eat, and now you can turn it into an easy Pop Rocks science experiment.

Potato Osmosis Lab

Explore what happens to potatoes when you put them in concentration salt water and then pure water.

Rising Water Experiment

Place a burning candle in water and watch what happens to the water. Explore the science of burning candles when you try this fun candle experiment.


Salad Dressing- Emulsification

You can mix oil and vinegar for the perfect salad dressing! It’s called emulsification. Simple science you can set up with ingredients found in your kitchen cupboards.

Saltwater Density Experiment

Investigate whether an egg will sink or float in salt water.

Skittles Experiment

Explore what happens to skittles candy in water and why the colors don’t mix.

Screaming Balloon

This screaming balloon experiment is an awesome physics activity! Explore centripetal force or how objects travel a circular path with a few simple supplies.

Screaming Balloon


Grab the glue and make a classic chemistry demonstration. Slime is all about science and a must try at least one. If you want a 2 for1, our magnetic slime is just about the coolest thing you’ll ever play with… it’s alive (well, not really)!

Stormwater Runoff

What happens to rain or melting snow when it can’t go into the ground? Set up an easy stormwater runoff model with your kids to explore what happens.

Surface Tension Experiments

Learn what the surface tension of water is and check out these cool surface tension experiments to try at home or in the classroom.

Walking Water

Watch the water travel as it makes a rainbow of color! How does it do that?

Walking Water

More Helpful Science Resources


It is never too early to introduce some fantastic science words to kids. Get them started with a printable science vocabulary word list. You’re going to want to incorporate these science terms into your next science lesson!


Think like a scientist! Act like a scientist! Scientists, like you and me, are also curious about the world around them. Learn about the different types of scientists and what they do to increase their understanding of their specific area of interest. Read What Is A Scientist


A new approach to teaching science is called the Best Science Practices. These eight science and engineering practices are less structured and allow for a more freeflowing approach to problem-solving and finding answers to questions. These skills are critical to developing future engineers, inventors, and scientists!

Best Science Practices

Bonus STEM Projects for Kids

STEM activities include science, technology, engineering, and mathematics.  As well as our kid’s science experiments, we have lots of fun STEM activities for you to try. Check out these STEM ideas below…


Middle School Science Fair Project Pack

Looking to plan a science fair project, make a science fair board or want an easy guide to set up your own science experiments?

Go ahead and grab this free printable science fair project pack to get started!

Science Fair Starter Pack