Earthquakes

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

True or False

Earthquakes occur when tension is released from inside the mantle?

• True

• False

Point A, a where slip initiated during the earthquake, is called the _______

• Epicenter

• Fault

• Plate

• Focus

Point B is called the ________

• Epicenter

• Fault

• Plate

• Hypocenter

Point C is called the earthquakes _________

• Fault

• Plates

• Fault scarp

• Focus

"A fracture or zone of fractures between two blocks of rock" is used to describe a ____________.

• Epicenter

• Focus

• Fault

• Crust

What is the difference between the 'hypocenter (focus)' and 'epicenter'?

• The hypocenter is located above the epicenter

• The earthquake rupture occurs at the epicenter and not at the hypocenter

• The epicenter is located above the hypocenter

• None of the following

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

Which one of the following statements is true about a body wave?

• A body wave travels through the interior of the earth

• A body wave travels through the crust

• A body wave can travel through both the interior and crust

• None of the following

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

• True

• False