A geyser shoots water and steam out of the ground. The hottest geysers heat steam to temperatures of 200°C or higher. Volcanoes, geysers, and hot springs all provide clues about Earth's interior. They also show one of the ways that Earth's layers interact with each other.

1. What do you predict Earth's interior is like? How do its rocks compare to rocks on the surface? Cite evidence that supports your prediction.