This science fair project idea researches the effects of acid rain on plant growth.

In this science fair project, learn how a mineral streak is made and how it can help identify an unknown mineral.

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

In this project, a basketball containing different psi is dropped to see how well it bounces.

In this investigation, three different juices are tested to determine which juice contains the greatest amount of vitamin C.

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

This project determines what category of person is most likely to be ticklish.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

Could there be toxic chemicals lurking in the cupboards and closets of your home?

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

Have you ever wondered how many numbers most people can memorize? Test your friends to find out!

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

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!

In this enlightening transpiration experiment, kids will explore how the loss of water from plants through transpiration contributes to the water cycle.

Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?

Do earthworms like moisture or darkness? Find out as we explore the relationship between earthworms and light.

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?

Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

This science fair project idea identifies clouds as a means of predicting the weather.

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

Camouflage is one of the most important animal adaptations in the African savanna biome. Kids create their own camouflage with this fun science fair project.

What do worms eat? Kids find out what kinds of rotting leaves and vegetables worms prefer in this cool compost science fair project.

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

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.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

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.