Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

This science experiment explores why leaves change color in the fall and the role of photosynthesis in leaf coloration.

The objective of this free science fair project is to examine the way in which the phases of the moon affect circadian patterns in mammals.

Test whether cutting up meats will make it cook faster than just cooking it whole.

This science fair project idea demonstrates the process of land erosion.

The purpose of this science fair project is to investigate whether we can simulate how craters are formed and predict their size and shape.

Check out this fun science fair project idea for middle school students to learn about the effects of temperature on the density of a gas such as air.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

In this science fair project, we'll explore how blocking the sun's light can stop those can stop photosensitive paper from changing color.

This science fair project investigates what type of cookie sheet bakes the best cookies.

Demonstrate if cooking destroys all bacteria that is present in raw meats such as salmonella.

This science fair project idea lets you build your own wind tunnel and tests different models of paper airplane.

Demonstrate how tracks are formed by pressing your hand into a cornmeal mixture, then reverse the process and make prints of the track.

Science fair project that demonstrate how abrasions are formed on rocks in nature and the variations between types of rocks.

Build a 3d animal cell model with this cool science fair project, which helps kids visualize and understand the function of a cell's parts and organelles.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

Science fair project that examines the benefits of the plant enzyme: pectin methyl esterase (PME). Where is PME found in the plant? What does it do chemically?

Science fair project that determines what percentage of air is made up of oxygen by examining the chemical reaction between oxygen and rust.

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.

Teach your first grade scientist the difference between liquids and solids using maple syrup.

Create an organic plastic product using vinegar and cream. Track decomposition over course of several weeks. Compare decomposition with traditional plastics.

Learn about our response to scents that existed in our environment over evolutionary time and consider why scents might affect our mood state.

Sure, you already know that water is made up of hydrogen and oxygen, but did you know that oxygen levels differ in different types of water?

Kids will love making clouds and learning how to make a water cycle model in this fun science fair project idea that explores evaporation and precipitation.

Read on this high school science fair project idea to get basic information on the process of heat transfer and the conditions under which the transfer occurs.

This science fair project idea's objective is to understand the architecture and function of neurons and their key components.

Would your dog prefer homemade or store-bought food? Raw or cooked? Test your dog's preferred diet in this fun experiment.

Students pit the heat capacity of water against the heat capacity of oil while looking at the effects of dipole rotation in this cool science fair project idea.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.