Front

A huge hole left behind when a volcano collapses is called a __________.

Back

Caldera

Front

What are the "waves" called that come from an earthquake?

Back

Seismic waves

Front

Which kind of wave arrives at seismic stations second?

Back

S (secondary) wave

Front

The edges of moving crustal plates are often defined by —

Back

Frequent seismic activity

Front

The biggest possible Earthquake would be described as Magnitude ___ (Just the number!).

Back

10

Front

What is the term for molten rock beneath the Earth's surface?

Back

Magma

Front

What is the term for molten rock that has erupted onto the Earth's surface?

Back

Lava

Front

What scale is used to measure the magnitude of earthquakes?

Back

Richter scale

Front

What is the point on the Earth's surface directly above the focus of an earthquake called?

Back

Epicenter

Front

What type of plate boundary is characterized by plates moving apart?

Back

Divergent boundary