EARTHQUAKES

An earthquake is defined as:

• The movement of tectonic plates without any surface effects.
• The shaking of the surface of the Earth due to a sudden release of energy in the Earth's lithosphere.
• A phenomenon that occurs only underwater.
• A natural disaster caused by heavy rainfall.

Earthquakes occur within the earth's lithosphere.

• False

• True

Which of the following is a primary cause of earthquakes?

• Human activities

• Weather changes

• Tectonic plate movements

• Volcanic activity

What scale is commonly used to measure the magnitude of earthquakes?

• Fujita scale

• Mercalli scale

• Beaufort scale

• Richter scale

Which layer of the Earth is primarily involved in the occurrence of earthquakes?

• Outer core

• Crust

• Core

• Mantle

The machine in the image seen here measures the strength and intensity of earthquakes. it is called a/an:

• Barometer

• Seismograph

• Anemometer

• Thermometer

On the Richter scale, the strength of earthquakes is measured from 1 to 10

• False

• True

This is where earthquakes begin, and where they are usually felt the strongest.

Large waves like the one seen in this image are caused by undersea earthquakes.

You tend to do the following steps:

• Before an earthquake

• After an earthquake

• During an earthquake