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This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

This science fair project idea examines whether boys and girls differ in reflexes.

Science fair project that examines how temperature affects density and how density in turn affects the behavior of helium gas.

This science fair project teaches students the differences between fruits and vegetables.

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

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

This science project teaches students to classify different shapes of leaves.

This science fair project idea studies which kind of rock (sedimentary, igneous, or metamorphic) is most damaged by frozen water.

This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

Find out whether optical mice are useful on all surfaces or if there are drawbacks to this supposedly superior solution to the traditional roller-ball mouse.

Find out whether putting something on top of a plant will inhibit its growth.

Ever wonder why refrigerator lights turn off when you close the door? Does the darkness prevent food from spoiling? This experiment, determines just that.

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

This science fair project idea discovers which brand of bubblegum produces the largest bubbles.

Science fair project that develops latent fingerprints on a non-porous objects by converting superglue from a solid state to a gaseous state.

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

This project examines whether playing music during class helps students learn or if it distracts students from learning.

This science fair project idea investigates how color affects temperature.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

Could there be toxic chemicals lurking in the cupboards and closets of your home?

Dive into the world of cooking oil and smoke points to discover just how fast some oils start smoking.

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!