Unit 3

Front

What is a Focus in the context of earthquakes?

Back

The true origin of an earthquake.

Front

What is a Batholith?

Back

A large portion of pluton that has been exposed by erosion.

Front

What is a seismogram?

Back

The record printed by a machine that records earthquakes.

Front

What are Secondary waves?

Back

They are shearing waves.

Front

What evidence supports the theory of Continental Drift?

Back

Distinct rock veins and fossil records.

Front

What is the difference between Primary waves and Secondary waves?

Back

Primary waves are compressional waves that can move through solids, liquids, and gases, while Secondary waves are shearing waves that can only move through solids.

Front

What is a Pluton?

Back

A body of intrusive igneous rock that crystallizes from magma slowly cooling below the surface of the Earth.

Front

What is the Richter scale?

Back

A logarithmic scale used to measure the magnitude of earthquakes.

Front

What is the difference between an earthquake's epicenter and its focus?

Back

The epicenter is the point on the Earth's surface directly above the focus, which is the true origin of the earthquake.

Front

What is a Tsunami?

Back

A series of ocean waves caused by any large and sudden disturbance of the sea, often due to underwater earthquakes.