Planet Earth 1

The fastest moving waves of an earthquake are the

The thickest layer of the Earth is the

When sediment moves from place to place, it is called

Acid rain wearing away rock is

The _________________ is made of partly liquid rock.

When water seeps into the cracks of rock and expands during melting, breaking rock.

Earthquakes occur at

When magma reaches the surface during a volcanic eruption, it is called

An earthquake begins at the

The temperature of the inner core is