Science fair project that tests how well various sunscreens protect skin from the sunâs ultraviolet radiation by measuring their effect on sun-sensitive paper.

This project explores how and how much one family can reduce the amount of garbage they accumulate over a three month period.

Kids love the dramatic Mentos and Diet Coke experiment conducted in this awesome science fair project.

Free science fair project idea examining how different types of water affect plant germination and growth.

The purpose of this science project is to investigate which will grow larger plants: compost, soil and Miracle - Gro, a mixture of both.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

This project examines the affect of temperature on viscosity and surface tension of different liquids.

Determine how wind speed affects the stability of a kite and the ease of getting it into the air.

This science fair project idea will be examining oxidation and acid rain

This free science fair project explores the "dirty" relationship between the presence of organic material in soil and water absorbency.

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

This science fair project idea determines the most effective method of preserving food.

This project examines whether corked bats truly make a ball travel farther than wooden bats that haven't been altered.

This science fair project idea quantifies the effect of specific food sources on red worm (Eisenia foetida) livelihood.

The purpose of this science project is to determine which chemical best lowers the temperature of water in a cold pack and if the amount affects its use.

This science fair project idea raises awareness of a real ecological issue.

Explore the belief in astrology as a predictive system.

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

Learn about the field of psychophysics and to learn about "Just Noticeable Differences."

Determine which kind of rock (igneous, sedimentary, metamorphic) has the greatest reservoir capacity, which is the ability to hold the most oil and natural gas.

Check out this fun science fair project idea to explore fun facts about fruit juices and learn why do juices turn bad in the fridge.

This science fair project idea focuses on the use a conductivity device to determine the ionic concentrations of hard water.

Science fair project that examines the relationship between fluid flow rate, pressure, and resistance.

A great science fair project on solar oven design that helps kids learn about solar power and solar heating.

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

Check out this fun science fair project idea to determine if the size of a particle affect the rate or speed of a chemical reaction.

Check out this cool science fair project idea to explore non-chemical means of preserving fruits by using thermotherapy.

Science fair project that helps you create your own compost pile in order to test the efficiency of different methods of composting.

Learn the anatomical and physiological differences between central and peripheral visual systems.

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.