Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Marshmallows are made of sugar, water, and air pockets. Since the marshmallow is flexible, will air pressure cause it to expand when heated in a microwave?

Get a better understanding of water content by dehydrating carrots.

This science project challenges students to study the salt content in tap water and learn about electrochemistry.

Check out this fun high school science fair project idea to identify features of a mushroom and learn how do humans use fungi to their benefit?

This science fair project idea focuses on the production of oxygen by plants during the photosynthesis process.

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

This project examines how temperature affects the volume of gas in balloons.

This project compares the national anthems of several different countries to determine if there is a correlation between tempo and a country's latitude.

In this project children practice the scientific method while playing with puffy paint.

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.

Demonstrate how static electricity can cause an object to move. It also examines just how an object affected by static electricity will move.

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

Air resistance is a crucial factor when designing a parachute. In this science fair project, students find what type of material works best as a parachute.

This project examines which type of dance burns the most calories.

Science fair project that demonstrates the effect of detergent pollution on fresh water birds' ability to stay afloat.

This fun science project helps to investigate how much water can a plant take up and release in a certain period of time through the process of transpiration.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

This project examines which style of central-air system filter traps the most particles from the air.

Compare the ignition rates of various types of flame-retardant materials.

Science fair project that explore how compound motion works by examining how gravity is affected by horizontal force.

This project determines how much the rebound rates of tennis balls change after ten games.

How do cold packs work? Explore endothermic reactions by comparing the temperature change that results from various chemicals added to water to find out!

In this science fair project, students test how objects float and sink in liquids of different densities.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

This experiment investigates the relationship between the temperature of a candle and its burn rate.

Test out various brands of permanent markers to see which one is least water soluble.

Science fair project which tests which antacids are most potent by measuring how well they neutralize the acid in lemon juice.

Determine whether the relationship between a personâs armspan and height are genetic.

Science fair project that tests how heat affects the chemical reaction between a seltzer tablet and a glass of water.