This science fair project idea investigates how the shape of an object affects drag.

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

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

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

Here is a hands-on activity to help third graders understand the four points of a compass...and how we use them to get around.

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.

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

In this plastic wrap science fair project, you'll learn about polymer permeability and find out which plastic wrap keeps food from dehydrating best.

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

This 4th of July, explore fourth grade science and make some safe fireworks in your own backyard using soda pop!

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

Making your own glass cleaner is easy, effective and inexpensive!

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

Learn about savanna flora and fauna in this science project! Take a look at characteristics of tropical grassland plants and animals that help them survive.

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

This science fair project idea examines liquids of different densities.

The project determines which laundry detergent is best for cleaning clothes.

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

This science fair project idea provides evidence that air is everywhere and takes up space.

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

Teach your kids about entropy with this fun, easy exercise, and teach your money to dance while you're at it!

Here's a fun activity that will introduce your fourth grader to the concept of frictionless motion by constructing a hovercraft.

In this project, different brands of microwave popcorn are tested and compared.

This science fair project idea produces sounds by creating vibrations using different objects.

This science fair project idea's objective is to understand the concept of air pollution and examine the quality of air in our environments.

This project investigates the affect of storage temperature on microwave popcorn.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.