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Third Grade 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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Third Grade “plant-biology”
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This science fair project explores how osmotic pressure forces water through the root up into the plant.
How Does Water Travel Up the Root of a Plant?
Third Grade
Elementary School
Explore if planting seeds in a certain direction will affect how fast it germinates.
Do You Need To Plant Seeds A Certain Direction For It To Germinate?
Third Grade
Fourth Grade
This science fair project idea explores whether talking to a plant will help it grow.
Talking to Plants
Third Grade
Elementary School
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?
Third Grade
Fourth Grade
Test whether plants can grow without sunlight and water.
Can Plants Grow Without Sunlight or Water?
Third Grade
Elementary School
This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.
Upside-Down Plants
Third Grade
Elementary School
This science fair project will help students learn about non-vascular plants, such as mosses.
Water and Mosses
Third Grade
Second Grade
This science fair project idea is to compare how long it takes a biodegradable item to decompose in a compost pile vs. in a garbage bag in a landfill.
To Compost or Not Compost?
Third Grade
Elementary School
This science fair project examines how seeds hitchhike on animals and clothing.
How Do Seeds Hitchhike?
Third Grade
Elementary School
This science fair project challenges students to study how camouflage and environment are related in squirrel populations.
Squirrels and Their Surroundings: The Relationship Between Camouflage and Habitat
Third Grade
Elementary School
This science fair project teaches students about wilting and browning of salad greens.
Why Do Greens Turn Brown?
Third Grade
Kindergarten
This science experiment tests whether warm or cold water works best in making cut flowers last longer.
Keeing Cut Flowers Fresh
Third Grade
Elementary School
In this project, sunlight is blocked from a leaf in order to see the affect that sunlight has on leaves.
Give Me Some Light
Third Grade
Elementary School

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