Check out this science project idea to compare organic produce to non-organic produce and how preservatives in food extend the shelf life of goods.

In this science experiment, observe convection currents forming and learn about how heat energy moves in liquids from hot to cooler areas through convection.

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.

Unlike other seed sprouting projects, this one allows kids to compare five different sprouts (either 5 herbs or 5 flowers) by watching them grow in a glove.

Check out this mind-blowing experiment in which a hard-boiled egg will fit through an impossibly small opening with the help of only a few matches!

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

Examine the effect of pressure on carbonation in soda.

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

Could there be toxic chemicals lurking in the cupboards and closets of your home?

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

If your fourth grader is obsessed with all things glow-in-the-dark, then here's an activity that will really light up her imagination!

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

Grow potatoes in a plastic bag—easy to grow and harvest, and yummy to eat!

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

This science fair project investigates why the number of visible stars changes from place to place.

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

This science fair project idea deals with the qualities of shade on a sunny day.

The objective of this science fair project is to test the growth rate of a plan in a crystal medium in comparison to traditional soil.

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.

This science fair project idea studies which brand of wintergreen candy produces the most sparks in the dark.

This science fair project idea investigates if heat from direct sunlight is hotter than heat from reflected sunlight.

This fun experiment provides a concrete and visually striking illustration of photosynthesis.