Plate Tectonics

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

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

• convection currents

• continental drift.

• subduction.

• conduction.

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.

What occurs because of convection currents?

• tectonic plates move

• pressure in the crust increases

• pressure in the crust decreases

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

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

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

• transform boundary.

• divergent boundary.

• convergent boundary.

• rift valley.

The Ring of Fire

• is on the Pacific Plate

• Is where a lot of volcanoes and earthquakes are

• Both answers are correct

Below is a picture of sea-floor spreading. How are the ocean crusts moving?

• Converging

• Diverging

• Sliding

• No movement

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

What type of boundary is the SAN ANDREAS FAULT on?

• Covergent
• Transformers
• Divergent
• Transform