CFA 6 Review

What causes rock in the mantle to be constantly moving causing things like sea floor spreading and subduction to occur?

• changes in pressure beneath the surface
• convection currents caused by changes in density
• layers of rock on top squish and move rock on the bottom

Which of the following is NOT a piece of evidence for Wegener's theory?

• Fossils of the same animals on separate continents
• Glacier marks showing how climate has changed in an area over time
• convection currents under the mantle move the Earth's crust
• Rock formations of the same age and patterns on separate continents

What is the name of the structure created in the oceans because of subduction?

• mid-ocean ridge
• deep-ocean trench
• sea mount
• guyot

Why was Alfred Wegener's theory of continental drift rejected during his time?

• He couldn't explain how the continents were moving.
• He didn't have enough evidence.
• His evidence did not make any sense.

What is the name of the process that makes new ocean rock which pushes the old rock outward?

• convergent movement
• subduction
• sea floor spreading
• transform movement

What force causes the constant recycling and making of new oceanic crust?

• Water moving around deep within Earth's crust.
• Energy from the sun heating the rock.
• gravity pushing and pulling on rock all the time
• convection currents in the mantle caused by heat from the core

What is the name of Alfred Wegener's supercontinent?

• Panthalassa
• Pangaea
• Gondwana
• Pannotia

What is the name of the process that recycles older ocean rock back into the mantle?

• convergent movement
• subduction
• sea floor spreading
• transform movement

What did Alfred Wegener's theory state?

• The continents are always moving quickly around the planet.
• The continents are breaking apart all the time.
• The continents were once all together and have since moved apart.
• We will live on a supercontinent again some day.

Which arrow is pointing to the area where sea floor spreading will occur?

• A
• B