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Third Grade Physical Science - Science Fair Project Ideas

Great selection of third grade science fair project ideas. These science fair projects can help you find third grade level ideas for your science fair.

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Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.
Does Adding Salt to Pasta make it Cook Faster?
Third Grade
Chemistry
Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.
Forensic Entomology and the Life Cycle of the Blowfly
Third Grade
Physical Science
Demonstrate the properties of pressure and surface tension to explain how water can stay inside an upside down glass using cardboard.
Magic Glass of Water
Third Grade
Physical Science
The purpose of this science fair project is to determine the strength of a magnet based on the distance it moves a magnetic toy car.
Can a Toy Car Reveal the Strength of a Magnet?
Third Grade
Physics
The goal of this science fair project is to investigate how distance affects the strength of the magnet. All you need is graph paper, a compass, and a magnet.
Magnetic Field Strength vs. Distance
Third Grade
Physics
How Does a Compass Work?
Third Grade
Physics
Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!
Does Hot Water Freeze Faster Than Cold Water?
Third Grade
Physics
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?
Sizing Up Marshmallows
Third Grade
Physical Science
This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.
How to Stop Soda From Exploding
Third Grade
Chemistry
Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.
Mylar vs. Latex Balloons
Third Grade
Physical Science
Certain fruits can change gelatinâs ability to set. In this experiment, kids will discover what happens when gelatin meets pineapple enzyme.
Pineapple Enzyme
Third Grade
Chemistry
In this experiment you will replicate the mummification process by making a hot dog mummy.
Hot Dog Mummy
Third Grade
Physical Science
This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.
Eureka! Volume and the Displacement of Water
Third Grade
Physical Science
Kids will make foaming soap monsters in their microwave by testing different kinds of soaps. Why does one soap produce more foam than another?
Foaming Soap
Third Grade
Chemistry
The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.
Color and Heat Absorption
Third Grade
Physical Science

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