Lagoons,peninsulas, and volcanoes

A lagoon is a shallow body of water separated from a bigger body of water by barrier islands or reefs. A peninsula is any body of land that is surrounded by water on three sides.  A volcano is a mountain-like structure that has a hole in the top that is filled with hot lava,or melted stone. Volcanoes dig more than 3,000 km deep into the earth. Hot lava can be aywhere from 800 C to 1,100 C.