Earthquake Revision

What is an earthquake?

• Energy released from the core of the earth up to the surface of the earth.

• Vibration in the earth’s crust caused by the sudden release of stored energy.

• Plates crashing into each other

Where are earthquakes located at?

• Singapore

• Along plate boundaries

• Everywhere on earth

• Inside the core of the earth

What form of energy is released from earthquakes?

• Kinetic Energy

• Heat Energy

• Seismic Energy

• Gravitational Energy

Earthquake's point of energy release is called... (the starting point of an earthquake)

• Epicenter

• Focus

• Core

Earthquake's point of energy release on the SURFACE of the earth is called...

• Epicenter

• Focus

• Core

How is an earthquake formed? Rearrange the process:

A. Pressure gradually builds up in the plates

B. Energy released by an earthquake causes the ground to vibrate violently.

C. Rocks slip to release seismic energy and resulting in an earthquake.

D. Plate movement causes a slow build-up of stress on the rocks of the fault.

• A>B>C>D

• D>A>C>B

• C>A>D>B

• D>C>B>A

The "small" earthquakes that occur after the main earthquake is called...

• Mini quakes

• Afterquakes

• Aftershocks

• Mini shocks

The amount of energy released is described as the ____________________ of an earthquake.

• Energy

• Multitude

• Magnitude

• Multiply

Which of the following does NOT affect the extent of damage of an earthquake?

• Depth of focus

• Time of occurrence

• Species of trees

• Level of preparedness

Earthquakes in areas with sparse population will affect lesser people than one that occurs in densely populated areas.

• True

• False