Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

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.

The objective of this science fair project idea is to examine light refraction as it passes through liquid crystals.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

examine how passive solar heating works, measure temperature in a parked car on a sunny day. ways to use passive solar heating as an alternative, energy

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

How do organic materials become soil? This science experiment measures what materials biodegrade.

Science fair project which measures whether tsunamis are more destructive when they are caused by an earthquake or by a meteor.

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

Total alkalinity and pH personal care products are controlled to prevent skin irritation. Learn more about basic and acidic substances in this science project.

This project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

This study evaluates if electronic devices commonly found in most households emit radiation, and if they do, how much?

This science project allows students to study the psychology of happiness.

This science fair project idea researches the different layers of the atmosphere and creates a visual representation of the atmospheric layers.

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

Discover which fabrics shrink the most in the wash and why.

This science fair project explores how osmotic pressure forces water through the root up into the plant.

Does your middle school teenager have good reflexes? Gauge his reaction time in this science and math activity that requires only a yardstick and a friend.

How good are humans at sound localization? Kids can try this cool science fair project idea to see how good their friends are at judging sound direction.

You've heard the expression "burn rubber" but do you know how heat affects rubber? Examine the impact of temperature on rubber in this fun science experiment.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

What can you do with hair after its cut? This science project teaches you practical uses for human hair.