Geography (Lesson 2)

What is an earthquake?

• An earthquake is the eruption of molten rock from inside the Earth's crust

• This is the shaking of the Earth's crust due to the movement of the plates

• An earthquake is the creation of new land formed by molten rock

• Earthquakes are caused when tension is released inside the Earth's crust

The place on the Earth's surface, above the origin of the earthquake, is called the _________

• Crust

• Focus

• Surface

• Epicenter

True or False

Earthquakes occur when tension is released from inside the mantle?

• True

• False

What are Seismic Waves?

• The energy caused by the breaking of rocks within the earth or an explosion.

• These are waves spread out from the focus.

• Vibrations caused by an earthquake

• All of the following

True or False

A "surface wave" is stronger than a "body wave".

• True

• False

Primary and secondary waves are one of the type of ________

• Surface Wave

• P Wave

• Body Wave

• Earthquake

Which type of wave travels the fastest?

• S Wave

• P Wave

S waves can travel through which one of the following?

• Gas

• Solid

• Liquid

• All of the above

Which wave can travel through all materials?

• P Wave

• S Wave

• Surface Wave

What is the name of the instrument used to measure earthquakes?

• Richter Scale

• Seismograph

• Seismogram

• Moment Magnitude Scale