PLATE TECTONICS

In sea-floor spreading, molten material rises from the mantle and erupts

• along the edges of all the continents.

• along mid-ocean ridges.

• in deep-ocean trenches.

• at the north and south poles.

The process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle is known as _______

• convection.

• continental drift.

• subduction.

• conduction.

Most geologists think that the movement of Earth’s plates is caused by _______

• convection.

• continental drift.

• subduction.

• conduction.

The geological theory of _______ states that pieces of Earth’s lithosphere are in constant, slow motion.

• subduction

• plate tectonics

• deep-ocean trenches

• sea-floor spreading

A place where two plates slip past each other, moving in opposite directions, is known as a _______

• transform boundary

• divergent boundary.

• convergent boundary.

• rift valley.

The place where two plates come together is known as a _______

• transform boundary.

• divergent boundary.

• convergent boundary.

• rift valley.

The San Andreas Fault in California is known as an active earthquake area. What type of

boundary is it?

• Converging

• Diverging

• Transform

• Sea Floor Spreading

What are the two types of crust

• continental and oceanic
• ocean and upper
• lower and upper
• pizza and subway

The Himalayas in Asia are an example of what type of plate boundary?

• divergent
• continent-to-continent convergent
• ocean-to-continent convergent
• transform

What is Pangaea?

• the name of a German scientist
• the name of the super-continent that existed millions of years ago
• another name for continental drift
• the name of an ancient fossil