Plate Tectonics

Front

The uppermost portion of the mantle that is semi-liquid, semi-solid molten rock is called the . . . Options: cryosphere, lithosphere, asthenosphere, magnetosphere

Back

asthenosphere

Front

When one lithospheric plate moves down into the asthenosphere under another plate at a convergent boundary, this is called . . .

Back

subduction

Front

The Himalayas were formed when this combination of plates collided: oceanic and oceanic, continental and oceanic, continental and continental.

Back

continental and continental

Front

When new lithospheric plate forms at divergent plate boundaries and gradually moves farther and farther away from the boundary, this is called

Back

seafloor spreading

Front

What clue did humans have to indicate seafloor spreading was happening?

Back

magnetic stripes in ocean rocks

Front

The Earth's magnetic field sometimes reverses itself (north turns into south and south turns into north).

Back

True

Front

Slab pull occurs at which type of plate boundary?

Back

convergent

Front

Which kind of lithospheric plate is thicker?

Back

Continental

Front

Which kind of lithospheric plate is more dense?

Back

Oceanic

Front

When oceanic and continental plates meet at a convergent boundary, which plate subducts?

Back

The Oceanic plate subducts.