Earthquakes and Volcanoes

Where do earthquakes most often originate?

• In the oceans.

• At faults.

• Near the South Pole.

• In Earth's outer core.

What term do we use to describe the strength of an earthquake?

• focus
• magnitude
• epicenter
• seismic wave

The San Andreas Fault that runs through California is an example of:

• a normal fault.

• a reverse fault.

• a strike-slip fault.

How many recording stations are needed to determine the epicenter of an earthquake?

• 2
• 3
• 4
• 5

What type of plate boundary are volcanoes most often found at?

• convergent

• divergent

• transform

• both convergent and divergent

Mapping earthquakes epicenters and volcanic eruptions helps scientists:

• determine the location of tectonic plate boundaries.

• predict future earthquakes.

• predict future volcanic eruptions.

• all of the above.

What is an earthquake?

• A rupture in Earth's crust.

• A large slab of the Earth's lithosphere.

• A large rift that develops between diverging tectonic plates.

• A disturbance or shaking of Earth's surface.

What is the difference between a focus and epicenter of an earthquake?

• There is not difference.

• The focus is the location of the earthquake on the Earth's surface and the epicenter is the point within Earth where the earthquake starts.

• The focus is the point within Earth where the earthquake starts and the epicenter is the location of the earthquake on the Earth's surface.

• The focus is the point within Earth where the earthquake starts and the epicenter has nothing to do with earthquakes.

What is a fault?

• A fracture or break in the Earth's crust.

• An irregularity in Earth's crust.

• A boundary between oceanic crust and continental crust.

• A very thin region of Earth's crust.

What is a normal fault?

• A fault that occurs where plates push together.

• A fault that occurs where plates pull apart.

• A fault that occurs where plates slide past each other.