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.

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