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In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

This science fair project idea produces varying pitches of sound.

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

The goal of this project is to create an exciting topographical map out of dough.

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

Young physicists will wrestle with a discrepant event: the Hammer Ruler Trick. They'll make some inferences about torque, balance, and center of gravity.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

In this experiment, you'll make a seafloor spreading model to learn more about how plate tectonics work and create mid-ocean ridges.

The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

In this experiment you will replicate the mummification process by making a hot dog mummy.

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

In this science fair project, students make their own rain gauge to measure rainfall.

Demonstrate how static electricity can cause an object to move. It also examines just how an object affected by static electricity will move.

Science fair project in which you will learn more about the natural world by preserving and identifying different animal tracks.

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.

Learn the basic structure of a DNA strand, which is the double helix, how genes form together, and the resemblance DNA has to a twisted ladder. Create a model.

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

What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

In this science experiment, your child will test the strength of hollow structures in order to understand how strong bird bones really are.

Learn all about balance and motion as your child designs a corn maze!

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.