3rd Grade Science Science Projects

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

This science fair project idea explores whether talking to a plant will help it grow.

This science fair project idea investigates if webbed feet help a duck (and others) swim.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

Is it magic? No...it's the amazing, gravity-defying capillary action experiment! Kids will love this dramatic and enlightening science fair project.

In this project students experiment with making music using only glasses of water.

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

Kids learn how to manipulate additive and subtractive colors to send secret messages with red colored filters in this cool science fair project idea.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

Discover whether a metal will expand under hot water.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

Science fair project idea which teaches you how to make butter by separating cream into butter and buttermilk.

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

This science fair project idea investigates the hardness property of minerals.

This science fair project idea examines the reason boats are shaped and engineered.

This study evaluates if electronic devices commonly found in most households emit radiation, and if they do, how much?

Marshmallows are made of sugar, water, and air pockets. Since the marshmallow is flexible, will air pressure cause it to expand when heated in a microwave?

Do different types of oil mix or stack? Find out in this science fair project idea!

How does salinity affect the point at which water freezes? Kids will find out by performing this cool melting ice experiment.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.