Earthquakes

Front

What is the Earth's core primarily made of?

Back

Iron and nickel.

Front

What is used to determine earthquake risk?

Back

Strain in rocks near faults.

Front

What does an earthquake's magnitude measure?

Back

The size of seismic waves it produces.

Front

What is the epicenter of an earthquake?

Back

The place on the surface directly above the focus.

Front

What can cause a tsunami?

Back

Vertical movement at a fault under the ocean floor.

Front

What are seismic waves?

Back

Waves of energy that travel through the Earth, produced by earthquakes.

Front

What is the focus of an earthquake?

Back

The point within the Earth where an earthquake originates.

Front

What is a fault?

Back

A fracture in the Earth's crust along which movement has occurred.

Front

What is the Richter scale?

Back

A scale used to measure the magnitude of earthquakes.

Front

What is a tectonic plate?

Back

A large section of the Earth's crust that moves and interacts with other plates.