A physical change took place when carbon dioxide dissolved in the water. A chemical reaction between the carbon dioxide and the water also took place and formed carbonic acid. These chemical reactions are responsible for both the cave and the cave formations.

To learn more about caves and chemical reactions:

1. Go to the Underground Secrets WWW Sheet and print it.

2. Visit these Web sites. Then complete the WWW Sheet.
    Cave Formation
    The Geology of Solution Caves