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 science fair project idea examines liquids of different densities.

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.

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.

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

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.

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

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

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 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.

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.

Learn whether writing things down really makes things easier to remember.

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.

Teach kids about a fun way they can remember this more efficiently- the power of mnemonics. Kids will be amazed.

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

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.

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

This science fair project idea explores whether mint, known for its âcooling sensationâ really does lower temperatures.

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

This project examines if computer screen and text color affect retention and if people subconsciously prefer combinations of colors that help their retention.

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

This science fair project idea observes products available in the school cafeteria and waste produced by these products.