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100 Science Projects For 4th Graders

100 Science Projects For 4th Graders

Looking for science projects for 4th graders? Our science projects for 4th graders are engaging, fun and educational, making them a great starting point to inspire a love of science.

Plastic Milk
Make your own plastic milk from household items!
Easy
Egg with Vinegar
Did you know something mysterious happens to a raw egg when you put it into vinegar?
Easy
Create a Tornado in a Bottle
Make a powerful vortex with two pop bottles and some simple supplies!
Medium
Shrimp Habitat Preferences
Do shrimp like it hot or cold? Do they like the light or the dark? Find out in this fun experiment!
Medium
Breakfast and School Performance
Does eating breakfast help students do better in school? Find out in this science project!
Easy
Exploring the Relativity of Time
How does time pass for you? Is it the same for everyone? Let's find out!
Medium
Plant Growth and Water
Let's find out how much water plants need to grow healthy and strong!
Easy
Does Dog Saliva Kill Bacteria?
Is it true that a dog's saliva can be a secret weapon against bacteria?
Easy
Sinking Through Water: How Does Shape and Mass Affect Velocity?
Have you ever wondered how the shape and mass of an object affects its speed when it sinks through water? Let's find out!
Easy
Super Hero Egg Shells
Learn how arches are used to support heavy things with this fun experiment using egg shells!
Easy
Does Milk Help Plants Grow?
Does milk help plants grow better than water? Find out in this fun science project!
Easy
My Pet Rock in the Rock Cycle
Curious about pet rocks? Make some and learn about the rock cycle in the process!
Medium
How to Make Oobleck: Is it a Liquid or Solid?
Get your hands messy with this mysterious substance! Is it a liquid or a solid? Mix, squish and play to uncover its secrets!
Easy
Electricity from a Lemon
Discover the incredible power of lemons! With lemons and basic materials, you can create an eco-friendly battery that powers an LED light!
Easy
Magic Milk Painting
See colors magically move in milk with soap! This fun experiment demonstrates surface tension in a vivid way!
Easy
Jumping Rice Krispies
Make Rice Krispies jump with static electricity!
Easy
Rock Candy: Sweet Science
Get ready to become a candy-making scientist! Grow your own giant sugar crystals and make rock candy you can eat!
Easy
Rock Hardness Challenge
How hard is that rock? You can learn how to classify your own rocks by their hardness just like geologists!
Medium
Erosion: A Battle of Forces
Let's explore how the forces of nature shape the land around us! We'll use sand, water, ice, and wind to observe how erosion works.
Easy
Jiggly Earth: Exploring Liquefaction
Are there liquefaction concerns where you live? In this science project, find out what happens when you add water to different types of soil to mimic liquefaction.
Easy
Starburst Rock Cycle
Make delicious rock formations using Starbursts! Learn how the earth makes rocks in a tasty way.
Easy
Geode Rock Borax Crystal
Make your own sparkling geode rock crystals at home with Borax and see science in action!
Easy
Rocks and Minerals: Candy Geology
Have you ever wondered what the difference between a rock and a mineral is? Find out with this sweet experiment!
Easy
Crayon Rock Cycle
Discover how to make your own sedimentary, metamorphic, and igneous rocks using crayons!
Easy
The Chocolate Rock Cycle
Have you ever heard of rocks made of chocolate? Learn how rocks can be turned into a sweet treat in this delicious science project!
Easy
Sparkling Rainbow Crystal
Make your own sparkling rainbow crystals at home with Borax and see science in action!
Easy
Windy Wonders: Plant Growth
Have you ever wondered how wind affects plants? In this experiment, you'll find out by comparing two plants in different wind conditions.
Easy
Baking Soda Volcano
Create a fizzing, bubbling reaction with baking soda and vinegar! Learn about acid-base reactions and have fun while doing it!
Easy
Colors of Skittles Experiment
Did you know that some Skittles have a secret rainbow hiding inside them? It's true!
Easy
Explosive Elephant Toothpaste
Get ready to create a massive, bubbling tube of toothpaste using only a few simple ingredients! Don't miss out on the fun!
Easy
Growing Mold
What kinds of food does mold grow fastest on?
Easy
Cloud in a Bottle
With just a few simple steps, creating a cloud in a jar can help us understand the process of cloud formation!
Easy
Is Yeast Alive?
Have you ever wondered if the little brown grains of yeast you buy in the grocery store are alive? Let's find out!
Easy
Storing Bread Safely
Learn how to keep bread from spoiling by storing it in different environments!
Easy
Staining Teeth with Beverages
Let's find out which beverage leaves the most stains on our teeth!
Easy
Acid Rain and Guppies
Can acid rain hurt guppies?
Medium
The Effects of Sea Water on Bamboo
Can sea water help or hurt bamboo plants? Find out in this experiment!
Medium
Exploring Cave Formations
Discover how stalactites and stalagmites form in caves with this fun experiment!
Medium
Can You Taste With a Plugged Nose?
Can you tell the difference between an apple and a pear if you can't smell? Find out in this fun experiment!
Easy
Are You Fit?
Find out if you have the lungs of an athlete by testing your lung capacity with the water displacement method!
Easy
Investigating Insects on Trees
Join us on an adventure to explore the different kinds of insects living on three different species of trees!
Easy
Exploring Gender and Smell
Let's find out if there are differences in how males and females perceive smells!
Easy
Gender Differences in Lung Capacity
Find out if boys have a higher or lower lung volume than girls in this fun experiment!
Medium
Acid Rain and Algae
Let's find out if acid rain can hurt algae!
Easy
Build a Gauss Rifle
Make a magnetic chain reaction to launch a steel marble at a target at high speed!
Easy
The Painted Lady Butterfly
Watch the transformation of caterpillars into butterflies in just a few days!
Easy
Adhesive Tape Strength
Let's find out which type of tape is the stickiest and requires the most force to pull off a steel surface!
Easy
The Chili Cricket Experiment
Can chili peppers repel and even kill crickets? Find out in this fun science experiment!
Easy
Bouncing Soccer Balls
Let's find out which type of turf makes a soccer ball bounce the most!
Easy
Examining Gender and Memory
Let's find out if girls or boys have better short-term memory!
Easy
Drawing Skills and Gender
Do boys or girls have better drawing skills? Find out in this fun science project!
Easy
Speed Up Your RC Car!
Have you ever wanted to make your RC car go faster? In this science project, you will find out how to make your RC car go faster by changing the ...
Easy
Imagination and Gender
Can girls draw better than boys? Find out in this science project!
Easy
Boys vs. Girls: Who Can Identify Facial Expressions?
Can you tell the difference between a happy face and an angry face? Boys and girls aged 15 are put to the test to see who can identify facial expressions ...
Easy
Watering Plants: Does it Make a Difference?
Do you want to know if watering plants makes them grow faster? Join us in this experiment to find out!
Easy
Boys vs. Girls: Multitasking Abilities
Who can multitask better: boys or girls? Find out in this science project!
Easy
Music and Moods
Does music affect how we feel? Find out in this science project!
Easy
Preserving Flowers with Sugar
Do you want to make your flowers last longer? Try adding sugar to the water!
Easy
Plant Growth Enhancers
Let's find out if organic fertilizer helps mung beans grow faster than regular fertilizer!
Easy
Does Height Affect Stride?
Do you want to know if your height affects how far you can walk in one step? Find out in this fun experiment!
Easy
Anxiety and Memory
Does stress and anxiety affect our ability to remember? Find out in this fun science project!
Easy
Evaporation: What Affects the Rate?
Ever wondered why water evaporates faster in some places than others? Find out in this fun science project!
Easy
Burn Rate of a Candle
Does the temperature of a room affect how quickly a candle burns? Find out in this science project!
Medium
Does Highlighting Help Memory?
Does highlighting what you read help you remember more easily? Find out in this fun science project!
Easy
The Invincible Soap Bubble!
Can you make a bubble that won't burst? Find out with this fun science project!
Easy
Burning Speed of Scented and Unscented Candles
Let's find out if scented candles burn faster than unscented ones!
Medium
Territorial Hamsters
Do hamsters fight when placed in the same cage? Find out in this science project!
Easy
Moisture and Root Growth
Let's find out if the roots of a germinated green bean will grow towards moisture!
Easy
Cooling Cars with Sunshades
Hot cars can be cooled down with sunshades! Find out which type of sunshade works best in this science project.
Easy
The Erosion of Tooth Enamel
Does drinking soft drinks cause tooth erosion? Find out in this science project!
Easy
Swimming Raisins
Have you ever seen raisins swim? Find out how to make raisins swim with this fun science experiment!
Easy
Left-Handedness: A Science Project
Are you left-handed? Find out how many people are in the same boat as you in this science project!
Easy
Ants and Soil Fertility
Can ants help plants grow faster? Find out in this science project!
Medium
Collecting Micrometeorites
Have you ever seen a shooting star? What if you could collect the tiny rocks that make them?
Easy
Acidic Water and Zebra Mussel Shells
Does acidic water make Zebra mussel shells softer? Let's find out!
Easy
Taste Test Challenge
Can you tell the difference between sweet, sour, salty, and bitter? Find out in this fun science project!
Easy
Boys vs. Girls Reading Abilities
Let's find out if boys or girls are better at reading!
Easy
Singers and Cold Water
Do singers sound better after drinking cold water? Find out in this fun science project!
Easy
The Soil-Grass Connection
Does the pH level of soil affect how well grass grows? Find out with this fun science project!
Easy
Keeping Warm: A Comparison of Clothing Materials
Let's find out which clothing material is the best at keeping us warm!
Easy
Animal Night Vision
Can animals see in the dark? Find out if dogs, cats and monkeys can see color in the dark!
Easy
Music to My Ears
Can you tell the difference between musical notes? Find out if your left ear is better at recognizing musical notes than your right ear!
Easy
Sugar and Weight Gain
Can eating too much sugar make you gain weight? Find out by feeding baby mice apples and jelly beans!
Easy
Investigating Stomata Density
Let's explore how the number of stomata on pine tree leaves changes depending on the amount of traffic in the area!
Easy
Changing the Color of Flowers
Did you know you can change the color of flowers? With this science experiment, you can!
Easy
Plant's Favorite Color for Photosynthesis
Do plants have a favorite color for photosynthesis?
Easy
Mining Chocolate Chips from Cookies
Dig deep and find out what happens when we mine things out of the earth!
Medium
Levitating Train
Build a train that floats above a pair of magnetic tracks and can be pushed from one end to the other!
Easy
Can Fish Tell Time?
Can fish recognize when it's time to eat? Find out by creating a feeding schedule and observing your fish's behavior!
Easy
Colorful Emotions
Discover how colors affect our emotions by observing cars, clothes, and favorite colors!
Easy
Powering Up with Potatoes
Learn how to make a battery from potatoes and measure the voltage and current it produces!
Easy
Make a Pinhole Viewer
Make a simple pinhole viewer to see the images carried by light shining through a pinhole!
Easy
Nitrogen and Plant Growth
Let's find out how different levels of nitrogen affect the growth of bean plants!
Easy
The Soil Moisture Mystery
Can earthworms and water help plants grow? Join us in this experiment to find out!
Easy
Plant Height: Soil vs. Hydroponics
Can plants grown in soil or hydroponically reach the same heights? Let's find out!
Easy
Temperature and Algae Growth
Let's explore how temperature affects the growth of algae!
Easy
The Effects of Phosphoric Acid on Tooth Enamel
Does the acid in soda really cause tooth decay? Find out in this experiment!
Medium
Finding Your Blind Spot
Have you ever wondered why you can't see certain things? In this project, you'll explore the blind spot in your vision and learn how to find it!
Medium
Does Caffeine Affect Blood Pressure?
Does drinking a can of soda really raise your blood pressure? Find out in this experiment with 6th grade girls!
Medium
Salinity and Convection
Let's explore how salinity affects the movement of water!
Easy

4th Grade Science Project FAQ


What are some easy 4th grade science fair projects?

Any one of these easy 4th grade science projects will teach you important scientific concepts and help you have fun while learning. An easy science project is a great way to introduce the wonders of science to 4th graders!

  • Sinking Through Water

  • Egg with Vinegar

  • Does Milk Help Plants Grow?

  • Magic Milk Painting

  • Breakfast and School Performance

  • Plant Growth and Water

  • Sparkling Rainbow Crystal

  • Plastic Milk

  • Does Dog Saliva Kill Bacteria?

  • Super Hero Egg Shells

Science fair project details right above the FAQ!


What is the best 4th grade science fair project ever?

We love the Plastic Milk science project for 4th graders. It demonstrates the effect of heat and acid on milk proteins and teaches students about the precipitation of solids and acids and bases.

If you're looking for more 4th grade science projects, check out the 4th grade science projects at the top of this page! 

Check out more Best Science Fair Projects


What are some cool 4th grade science projects?

Get ready to be amazed by these super cool science projects for 4th graders! With just a few simple things, you can be fascinated by science and have tons of fun with these cool 4th grade science projects!

  • Create a Tornado in a Bottle

  • Plastic Milk

  • Egg with Vinegar

  • Does Dog Saliva Kill Bacteria?

  • Super Hero Egg Shells

  • Magic Milk Painting

  • Electrifying Lemon Battery

  • Making Oobleck: Liquid or Solid?

  • Egg Drop Project

  • Colors of Skittles Experiment

  • Cloud in a Bottle

Science fair project details right above the FAQ!


What are 5 testable questions for 4th grade?

A testable question is a question that we can answer through a science experiment. To do this, we do a control science experiment, then we change one thing in the experiment to see how it affects what happens. This is how we can discover the answer to our question!

  • What makes a cloud form?

  • Can drink and food taste different just by changing its color?

  • Does the color of light affect photosynthesis?

  • Does temperature affect seed sprouting?

  • What makes popcorn pop?

Here are more testable questions along with their science projects


What are the top 10 science projects for 4th grade?

These are our top 10 science projects for 4th grade, with projects from Biology, Chemistry and Physics. These projects can be used as science fair project ideas or as a fun experiment to explore different areas of science!

  • Plastic Milk

  • Egg with Vinegar

  • Create a Tornado in a Bottle

  • Shrimp Habitat Preferences

  • Breakfast and School Performance

  • Exploring the Relativity of Time

  • Plant Growth and Water

  • Does Dog Saliva Kill Bacteria?

  • Sinking Through Water

  • Super Hero Egg Shells

Science project details right above the FAQ!


Can I do a 4th grade science fair project in a day?

Yes! Quick experiments can be a great option for a science fair project! If you want to explore quick reactions, we have science project ideas on various topics to get you started.

  • Acid-base reactions: Mixing acids with bases quickly makes carbon dioxide gas!

Make a rocket fly sky high with just baking soda and vinegar! Rocket Film Canisters

Learn how to make your own acid/base indicator using red cabbage and use it to test different fluids! Make Your Own PH Indicator

  • Chromatography reactions: Separate out colors!

Did you know that some Skittles have a secret rainbow hiding inside them? Colors of Skittles Experiment

Have you ever wondered why leaves change color in the fall? Let's find out by using chromatography to separate the colors of a green leaf! Uncovering Fall Colors

  • Heat reactions: Heat speeds things up!

Do you want to find out which color candle burns the fastest? Which Candle Burns the Fastest?


What are some hands-on ways to find inspiration for my science fair project?

Science museums are great places to explore if you're looking for inspiration for your next science fair project or just want to learn more about science. Science museums, natural history museums, space museums, and discovery museums are all great places to do that! You can discover all sorts of interesting things about science and find cool project ideas for science fairs.

Don't worry about how much it costs to get into the science museum, as there may be free admission days or free passes to a science museum near you! Check your credit card for offers, your local library for free museum passes, and nearby science museums for free entrance days.

Find a science museum near you and prepare to be awed by all that you can learn there! I always learn something new and am inspired whenever I go to a science museum!


How do I start a science fair project?

Science fair projects are a fun and unique way to discover science by asking a question and doing a science project. We'll help you find a science fair project idea and guide you through the process of doing and presenting your science fair project with Science Fair Coach's Science Fair Project Guide.


What should I do after I have a science fair project idea?

If you have a science fair project idea, Science Fair Coach can help you turn it into a full science fair project! Starting at Science Fair Coach's Guide to the Scientific Method, we'll guide you through every step of the scientific method, from designing and conducting your experiment to collecting and analyzing your findings. Then, we'll help you showcase your results on a science fair board for others to learn from and enjoy.


How do I make a science fair board?

Your science fair board is where you show off your science fair project for everyone to see and learn from. With Science Fair Coach's step-by-step guide, you can make sure your science fair board stands out and impresses at the science fair!


Where can I find a science fair competition?

Science fair competitions are an excellent opportunity to explore science. One of the of the premier science advocacy organizations, the Society for Science, is associated with more than 400 science fair competitions in almost every US state, as well as over 70 other countries, regions, and territories. You can find out if there's a Society of Science affiliated science fair near you!

The WWW Virtual Library: Science Fairs website also has a collection of science fairs from all over the world, as well as national, state, regional, local, and virtual competitions!

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