Earthquakes Lesson 1

Front

What is an epicenter?

Back

The surface right above where an earthquake started.

Front

What instrument detects and measures earthquakes?

Back

Seismograph.

Front

What causes earthquakes?

Back

The movement of plate tectonics.

Front

What are earthquakes?

Back

The shaking that results from the movement of rock beneath Earth's surface.

Front

What can earthquakes under the water cause?

Back

Tsunamis.

Front

What is the focus of an earthquake?

Back

The point within the Earth where an earthquake originates.

Front

What is a seismogram?

Back

A record produced by a seismograph that shows the intensity and duration of an earthquake.

Front

What are tectonic plates?

Back

Large sections of the Earth's crust that move and interact with each other.

Front

What is a fault line?

Back

A fracture in the Earth's crust where blocks of land have moved past each other.

Front

What is the Richter scale?

Back

A scale used to measure the magnitude of an earthquake.