This science fair project idea identifies clouds as a means of predicting the weather.

This science fair project idea explores whether boiling and freezing water will have an effect on how much it weighs.

Science fair project that examines how temperature affects density and how density in turn affects the behavior of helium gas.

Use playing cards to learn about temperature as well as positive and negative integers in this fourth grade math game.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

Science fair project that examines how yeast grows, and which conditions allow for optimal growth. What types of nutrients does yeast prefer?

Here is a fun middle school science project on factors affecting solubility. Learn how dissolved solids can "crash out" to form crystals when conditions change.