Use 100 one- or two-ounce cups, like pill cups.

Fill 97 to the top with salt water, two with frozen water, and 1 with fresh water. The cups represent the amount of water on earth.

This graphically demonstrates the relatively small amount of fresh water available to life that lives on the land. It should start a deep discussion of the stark dangers of water pollution!

Global warming is causing the melting of polar ice caps. How will this affect the earth? Melt the water ice in the two "frozen water" cups. Pour them into the already full salt water cups. Note how flooding takes place on coastlines!

A special thanks to Sherry Robbins of Lumberton Primary for sharing this great activity with us!