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Science Fair Project Ideas

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

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Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.
Rainbow in a Jar
Weather and Climate
Second Grade
In this science fair project, you'll make a 'ghost' appear in a test tube, and learn about what happens when hot water and cold water interact.
The Ghost in the Tube
Elementary School
Weather and Climate
In this science fair project, students make their own rain gauge to measure rainfall.
DIY Rain Gauge
Weather and Climate
Fourth Grade
In this science fair project, students will use the streak test to tell minerals apart from each other.
Streak Test: A Way to Tell Minerals Apart
Elementary School
Geology
This science fair project idea studies which kind of rock (sedimentary, igneous, or metamorphic) is most damaged by frozen water.
Which Type Of Rocks Are Most Damaged By Freezing?
Elementary School
Geology
Free science fair project idea about using microscopes and magnifying lens to find out what grainy soil particles make up dirt.
Grainy: What Kinds of Particles Make up Soil?
Elementary School
Geology
In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.
Popcorn Pumice: Exploring Different Rock Densities
Geology
Third Grade
In this experiment, students will create their own version of coquina, a sedimentary rock thatâs formed by seashells and sand, cemented by seawater minerals.
Pasta Coquina: Make Your Own Sedimentary Rock
Elementary School
Geology
In this free science fair project idea, we learn about how scientists use indicators to predict the earth's climate and geology many years ago.
Indicators: How do Scientists Gather Clues to Climates of the Past?
Elementary School
Geology
In this science fair project, students create their own miniature salt flats at home.
Create Your Own Miniature Salt Flats!
Geology
Fourth Grade
This science fair project idea demonstrates sonar mapping of the ocean floor.
Understanding Sonar Mapping of the Ocean Floor
Elementary School
Geology
In this experiment, students will discover how heat and pressure turn clay into slate, phyllite, and finally schist.
How Does Heat and Pressure Create Metamorphic Rocks?
Geology
Fifth Grade
This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.
The Mohs Test: How to Compare the Hardness of Minerals
Elementary School
Geology
In this science fair project, students discover how sedimentary layers form as sediments like mud silt and sand settle over time.
How do Sedimentary Layers Form?
Elementary School
Geology
Check out this fun elementary science project idea about types of rocks formed after cooling down of magma or lava and intrusive and extrusive igneous rocks.
Fire Rocks: What Type of Rock is Formed When Lava Cools?
Elementary School
Geology

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