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Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

Which battery lasts the longest? In this science fair project, kids will test popular brand name batteries like Duracell and Energizer against generic brands.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

This science fair project idea studies how talking on a cell phone affect driving?

This experiment strives to determine if tracking of conservation habits will lead to reductions in a family's electricity and water bills.

This experiment will investigate whether reward or punishment is more apt to motivate people.

Research long-term effects and draft a questionnaire about frequency of marijuana use and average annual income. Interpret findings in a detailed report

Research information on vitamin content in foods, Examine the effect of vitamins, test organic samples of fruits, meats, grains for vitamin content.

This science fair project idea examines whether music has an effect on a person's ability to complete a simple task that requires concentration.

Get a cool science project idea on a photovoltaic cell and explore the various factors that affect the energy output of the photovoltaic cell.

Look for correlation between pH values of commercial soaps and detergents and manufacturer claims about eye irritation hazards.

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

This science project teaches students to classify different shapes of leaves.

This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

This science fair project idea studies which kind of rock (sedimentary, igneous, or metamorphic) is most damaged by frozen water.

Evaluate the efficacy of different pain management techniques.

Find out whether optical mice are useful on all surfaces or if there are drawbacks to this supposedly superior solution to the traditional roller-ball mouse.

Find out whether putting something on top of a plant will inhibit its growth.

Science fair project that guides you through how to test the humidity in the environment using a homemade psychrometer.

This play-activity causes young children to focus on and become more aware of their sense of hearing and the power of their ears.

Ever wonder why refrigerator lights turn off when you close the door? Does the darkness prevent food from spoiling? This experiment, determines just that.

In this experiment, recycled objects are separated to demonstrate how mixtures are made and the variance in the physical properties of their ingredients.

This project examines how temperature affects the volume of gas in balloons.

Evaluate gender differences in processing visual information.

Science fair project that designs a video game that requires players to use relevant skills.