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This fun science fair project idea helps students learn how acid rains are formed and explore how acid rain damages the environment.

Here is a cool and easy science project to determine the rate of chlorophyll breaks down and how it affects the color change of grass from green to yellow.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

This project examines what types of objects burn and which burn faster and cleaner.

Find out whether matte or shiny nail polish lasts longer.

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.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

This science fair project idea explores alcoholic fermentation at work by making your own soda.

What is condensation? Little mad scientists will learn about condensation, states of matter, and air pressure by conducting this cool science experiment.

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.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

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

This study evaluates if electronic devices commonly found in most households emit radiation, and if they do, how much?

Do you think heat can affect a plant's growth rate?

This science fair project compares the allelopathic affects of juglone, a chemical agent produced by the Black Walnut tree, on two plants.

Find out whether a longer airplane will fly farther or a wider paper airplane.

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

Kids learn about potential energy, and mechanical energy, and how to make power from water with one of our favorite renewable energy projects for kids.

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

Science fair project which measures whether tsunamis are more destructive when they are caused by an earthquake or by a meteor.

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

This science fair project examines which fruits and/or vegetables will ripen prematurely when placed with ripe apples.

Is horse manure a possible energy source in a crisis? Use calorimetry to find out how much energy horse manure can produce in this science fair project.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.