Water can flow under the ground as well as above, in the form of underground rivers. Stalactites and stalagmites are some of the amazing formations which have been created by underground water.

This clip is from:
Science Clips, Rocks and Soils
First broadcast:
9 October 2007

Pupils could create fact-files on the vocabulary associated with caves and explain how caves are formed. The children could make clay or papier mâché models of a cave showing the underground river and stalactites and stalagmites. Sand and water could be used to show how the water erodes the rock to make caves.