This science fair project idea examines liquids of different densities.

This science project has students study a group of volunteer liars actively lying to study the behavior of a lie. Students see if they can figure out the truth.

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

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

The objective of this science fair project is to study the photosynthesis process and demonstrate the important role that leaves play in the process.

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

The purpose of this study is to determine if people can tell the difference between organic and conventional food from looking at, smelling and tasting it.

What is biodiversity? Kids will study different areas of their backyards to see which is the most diverse to learn about biodiversity and random sampling.

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

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

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

This science fair project idea studies which brand of wintergreen candy produces the most sparks in the dark.

Experiment with buoyancy to learn how a submarine rises and sinks in this classic science experiment.

This science fair project idea studies which kind of rock (sedimentary, igneous, or metamorphic) is most damaged by frozen water.

This science fair project idea investigates whether plants can survive being frozen.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

This science fair project idea determines if the color of light affects the growth of plants.

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

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

This science fair project idea explores which fruit molds the fastest.

The project investigates the affect music has on plant growth while experimenting with rock, classical and no music.

This science fair project idea explores the different properties & interactions of sugar molecules.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

Is there a relationship between caffeine and heart rate? Students will determine the effect of caffeine on heart rate in this fun science fair project.