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

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.

Research overview of architecural acoustics. Design and build a whispering wall from wood or plastic. Test which materials work best.

The objective of this science fair project idea is to explore which brands of "anti-fade" shampoos work the best to keep hair color looking fresh.

How do cold packs work? Explore endothermic reactions by comparing the temperature change that results from various chemicals added to water to find out!

Science fair project that examines learn how the angle of incidence affects the efficiency of solar panels. How does a solar cell work?

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

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!

What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!

How does light affect plant growth? Do different colors of light work better than others? Find out in this classic science fair project idea.

Science fair project that demonstrates the process known as refraction, which allows glasses and contact lenses to help people with poor vision.

This experiment evaluates if the lighting in a room affects the speed at which test subjects perform mental tasks.

In this science project idea learn about working of different types of smoke detectors and find out which one is the most effective for you.

This fun elementary school science fair project idea helps students in designing an amusement park using their knowledge of forces and simple machines.

Research currently available fuel sources, and fuel manufacturing and processing techniques. Propose an alternative fuel source.

Is cleaning with lemon effective? Get ready to give this science project some elbow grease and find out if acidic lemons can be used as a cleaning agent.

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 compares whether ionic dryers leave hair in better condition than non-ionic dryers.

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

Looking for a project on machines? Get a fun elementary school science fair project idea to design a compound machine using your knowledge of simple machines.

Research and understand basic computer science. Build a simple computer, following instructions found online. Design a new or improved feature.

The goal of this science fair project is to demonstrate current methods of detecting counterfeit money, in particular counterfeit detection pens.

Check out this cool science fair idea on why hard fruits become soft and learn how to compare the sugar content between ripe and unripe fruits.

Check out this fun science fair project idea to learn how alkaline batteries convert chemical energy to electrical energy?

Check out this fun science project idea to get a better understanding of unstable isotopes and the process of radioactive decay of isotopes through modeling.

Free science fair project idea that examines the impact of gravity on a dropped carton of eggs. Design a device to protect the eggs from cracking.

Demonstrate and explain holographic technology. Determine if a holographic image of a magnifier still magnifies the object beneath it. Explain the effect.