Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

In this microwave plant experiment, find out whether microwave radiation will affect radish seed germination. Will it help or hinder the plants' growth?

Construct calorimeter and determine the caloric value of a sample of foods by change in temperature for each of the foods.

The objective of this science fair project is to determine whether planaria reproduce asexually by regeneration.

The objective of this experiment is to evaluate the effects of acid rain on plants.