Unit 4 Chapter 1: Earthquakes

Which of the following is considered to be the main driving force of plate tectonics resulting in earthquakes?

Convection in the mantle

San Francisco is located near the San Andreas fault. Which of the following disasters is most likely to occur?

Earthquakes

Stress builds up on both sides of a fault. The rock deforms plastically, or bends, until the stress is too much. The rock on both sides of the fault snap back into their original position and release energy when they move.

Elastic rebound

An earthquake's ________ is found above the focus, on the land's surface.

Epicenter

The _____ is the point on the land surface that is directly above the focus.

Epicenter

The point on the Earth's surface above the focus is known as the seismic center.

False

The point within Earth where seismic waves originate is the epicenter

False

The _____ is where an earthquake happens within Earth.

Focus

The initial point in the crust where the rocks rupture in an earthquake is called the ______.

Focus

Which of the following is the place of origin of an earthquake?

Focus

Most earthquakes

Occur at plate boundaries

Energy released in earthquakes is transmitted by

Seismic waves

In a subduction zone, the most dangerous earthquakes are those at __________ depths.

Shallow

The description of how earthquakes occur is called elastic rebound theory

True

The origin of earthquakes is explained with the help of the elastic rebound theory.

True