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Fourth Grade Science Fair Project Ideas

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

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Fourth Grade “ocean-science”
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Check out this fun science project to explore if sodium polyacrylate can be a possible alternative to the use of chemical dispersant in oil spill cleanups.
Which Oil is Easier to Cleanup with Diaper Powder?
Fourth Grade
Elementary School
This science fair project idea explores the relationship between oil and water in terms of density as well as hydrophilic/hydrophobic compounds.
Homemade Lava Lamp
Fourth Grade
Elementary School
Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.
Too Cold To Snow?
Fourth Grade
Third Grade
Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.
Do Plants Need Water?
Fourth Grade
Third Grade
This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.
Don't Rock the Boat
Fourth Grade
Third Grade
Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.
Speaking Under Water
Fourth Grade
Elementary School
This science fair project idea compares biodiversity between drops of water.
Biodiversity in a Drop of Water
Fourth Grade
Elementary School
In this experiment you explore how tectonic plates move to create land and expand bodies of water.
Exploring the Movement of Tectonic Plates with S'Mores
Fourth Grade
Elementary School
The objective of this science fair project is to analyze the effects of salinity and temperature on water.
How Does Salinity and Temperature Affect the Density of Water?
Fourth Grade
Elementary School

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