Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

This science fair project examines how carnivorous plants digest insects, and whether the plant can use nitrogen in the soil to compensate for lack of insects.

Design and build a scale model representing living tree architecture. Then build a full-size version using one or more lives trees, and test your creation.

Learn about the fruit fly life cycle in this experiment. Capture fruit flies to examine various stages of insect metamorphosis.

Science fair project that determines what neurons are, what they do and compiles this vital information in an illustrated book.

Soil and energy don't go together, right? That would be as bizarre as a pairing of peanut butter and marshmallows! Well, actually...

This science fair project idea produces consumable fresh water from salt water through desalination.

This science fair project idea explores the fastest average speed a human can talk.

Are your taste buds up for the challenge? Put tongues to the test with this science fair project that examines who enjoys sour flavors more, adults or kids?

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

This recipe makes bubbles that not only blow up nice and big, but do tricks and experiments! How do you do it? It's not a secret, it's science!

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

Protozoa and ciliate and amoeba, oh my! The objective of this science fair project is for students to use a microscope and identify microscopic life.

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

How does mold grow? Kids find out by testing different conditions to measure mold growth rate and learn about what factors cause mold to grow more quickly.

Science fair project that determines which materials cause the most friction by sliding blocks of wood down a ramp.

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.

Free science fair project idea that examines cheating in school-age children. Project involves a task in which children are tested on various tasks.

Are you ready to pilot your own airplane? Well, then take to the skies with this high-flying project!

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

Check out this cool science fair project idea to explore various aspects of projectile motions like mass, angle and distance.

This science fair project idea determines whether dogs can be trained faster using a food reward or praise.

Look for correlation between pH values of commercial soaps and detergents and manufacturer claims about eye irritation hazards.

This project involves the programming and development of a 3D Rubik's Cube application using C++.

Observe trends in the properties of writing materials over past 5000 years and extrapolate to future time. Prepare a table that compares writing material.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

This science fair project idea discovers the effect of (high) heat on animal cells.

Science fair project idea examines what is remembered from high school education. Formulate and administer high school curriculum tests to adults over 21.

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.