Soil is made up of different layers. How far down do you need to dig to find the soil horizon, or the place where bits of leaves and branches become soil?

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 non-chemical means of preserving fruits by using thermotherapy.

Discover whether cheap saline solution bottle cleans and disinfects just as well as more expensive kinds formulated with different ingredients.

This science fair project idea identifies the properties of soap bubbles and invents a new or improved bubble solution.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

In this science fair project, students create their own miniature salt flats at home.

This project examines the concentration of dissolved oxygen in water, with and without oil.

This science experiment tests if dog saliva can really help heal wounds.

Kids learn how to make a simple electric motor in this great engineering science fair project that teaches them how current generates its own magnetic field.

In this experiment, you will be making your own paper flashlight by conducting electricty with graphite.

Looking for a project on machines? Get a fun elementary school science fair project idea to design a compound machine using your knowledge of simple machines.

This experiment investigates if small changes in your diet can alter your basal body temperature.

This science fair project will help students learn about non-vascular plants, such as mosses.

The thermometer outside is dip, dip, dipping! What kind of clothes will keep you warmest this winter? This project determines which materials insulate best.

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

Learn about this simple machine and make a pulley of your own to use for fun science trials.

This science fair project idea explores what common compounds can be easily separated out in a centrifuge.

Check out this fun science project idea to get a better understanding of unstable isotopes and the process of radioactive decay of isotopes through modeling.

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

What is biodiversity? Kids will study different areas of their backyards to see which is the most diverse to learn about biodiversity and random sampling.

Learn about where colors come from and how light absorption works in this fun experiment! All you need is a flashlight, construction paper, and cellophane!

This science fair project idea compares the cuteness reaction between genders.

This science fair project determines whether the types of plants growing in a Pacific Northwest rain forest environment are influenced by the soil acidity.

Science fair project about different digital image file types, compares different encoding algorithms used to compress the data.

This experiment will determine how different kinds of light affects the strength of bakerâs yeast.

This fascinating science fair project explores eye color genotypes.

Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.

The goal of this science fair project is to investigate the effect of irradiation on the germination and growth of vegetables, such as the tomato plant.