Plate Tectonics Review

What is the supercontinent that existed about 250 million years ago and made up all of the land on Earth?

• Asia

• Laurasia

• Gondwanaland

• Pangaea

Where is new seafloor created?

• mid-ocean ridges

• deep sea trenches

• transform boundaries

• no new seafloor can be created

Where is old seafloor destroyed (recycled back into the Earth)?

• mid ocean ridges

• deep sea trenches

• old seafloor is never destroyed

• divergent boundaries

What first helped scientists learn what the bottom of the ocean floor looks like?

• lasers

• robots

• sonar

• deep sea divers

How far can the plates move each year?

• the plates do not move

• 3-9 kilometers

• 1-12 centimeters

• 25-50 meters

What can a convergent boundary create?

• mid-ocean ridges and mountains

• subduction zones and continental collision

• rift valleys and volcanoes

• mid-ocean ridges and subduction zones

What geographical feature does continental collision create?

• valley

• volcano

• river

• mountain

Which of the following does NOT happen at a subduction zone?

• volcanoes

• islands

• deep ocean trench

• mid-ocean ridge

What natural hazard can a transform boundary create?

• tornados

• earthquakes

• volcanoes

• all of the above

What idea says that all of the continents were once joined together in a single landmass and have since drifted apart?

• Theory of Pangaea

• Hypothesis of Continental Drift

• Theory of Seafloor Spreading

• Theory of Plate Tectonics