Earthquakes and Volcanoes

How do fold mountain form?

• Land on one side of a fault is raised, while the other side drops downward.
• When magma rises toward the surface but doesn't break through the crust.
• From a fiery explosion.
• When plates collide, causing the crust to fold and crumple.

What is used to measure the magnitude of an earthquake?

• A digital scale
• A Richter Scale
• A bathroom scale
• A dichotomous scale

What do you call molten rock under the earth's crust?

• melted rock
• magma
• lava
• pumice

What is molten rock after it break through an opening in the Earth's crust?

• Magma
• Melted rock
• Pumice
• Lava

What is a hot spot?

• An area in the interior of a plate where hot magma escapes Earth's crust.
• An area where you can get wireless internet.
• A place on your skin that burns.
• A popular place to hang out.

What do earthquakes, volcanoes, and mountain building have in common?

• They occur suddenly.
• They are measured by seismographs.
• They result from plate motion.
• They cause major disasters.

In California, earthquakes strike because of plate motion along the:

• coastline of the Pacific Ocean.
• San Andreas Fault.
• Sierra Nevada Mountains.
• Edge of San Francisco Bay.

Where are volcanoes located?

• Where plates slide by one another.
• Where fault-block mountains form.
• Where epicenters are found.
• Where magma reaches the surface.

This area is responsible for 90% of all earthquakes in  the world and contains numerous faults:

• Indian Ocean
• English Canal
• The Ring of Fire
• Mid-Atlantic Ridge

A break in the rock of the crust where rock surfaces slip past each other; usually occur along plate boundaries:

• focus
• epicenter
• fold
• fault