Earthquakes and Volcanoes

Front

What is the determining factor in which type of eruption will occur?

Back

The chemistry of the magma.

Front

Which city was destroyed in 79 A.D. by the eruption of Mt. Vesuvius?

Back

Pompeii.

Front

What is a seismogram?

Back

A tracing of earthquake motion created by a seismograph.

Front

What is seismology?

Back

The branch of science that studies earthquakes.

Front

What is the epicenter of an earthquake?

Back

The point on the Earth's surface directly above the focus of the earthquake.

Front

What are P-waves?

Back

Primary waves that are the first to arrive during an earthquake, traveling through solids and liquids.

Front

What are S-waves?

Back

Secondary waves that arrive after P-waves and can only travel through solids.

Front

What is magma?

Back

Molten rock located beneath the Earth's surface.

Front

What is lava?

Back

Magma that has reached the Earth's surface.

Front

What is a volcano?

Back

An opening in the Earth's crust through which molten rock, ash, and gases are expelled.