Plate Tectonics Test Review 23-24

Which of the following support sea-floor spreading? (Choose 2)

• Rocks are older the further you get from the Rift Zone and are younger the closer you get to the Rift Zone.
• Rocks are younger the further you get from the Rift Zone and are older the closer you get to the Rift Zone.
• Pillow lava/rocks show that molten material has erupted from cracks along the Rift Zone and quickly cooled.
• Coral grows in alternate strips on each side of the Rift Zone.

_____ discovered Sea-Floor Spreading in the 1960s.

The person who proposed the Principle of Continental Drift in 1911 was (a)   .

• Alfred Wegener
• James Hutton
• Harry Hess
• Charles Richter

The continents were once joined into a single landmass that has since broken apart which was named (a)   .

• Rhodinia
• Gondwana
• Panthelassa
• Pangaea

The reason for continental drift that Wegener never knew about is(are) _____.

• conveyor belts
• mantle convection
• gravity
• the Coriolis Effect

Plates move at a rate of about __ a year.

• 2 km
• 2 mm
• 2 cm
• 2 m

Places where two plates are moving away from each other in opposite directions are known as _____.

• transform boundaries
• convergent boundaries
• divergent boundaries
• invergent boundaries

This is called _____.

• subduction
• obduction
• conduction
• obliteration

What plate boundary is this?

• convergent plate boundary
• transform plate boundary
• divergent plate boundary

In ocean-continent plate boundaries, the oceanic plate is more dense than the continental plate so it subducts beneath it.

• True
• False