Plate Tectonics Practice, Practice, Practice!

A tectonic plate is also called __________ plate.

• atmospheric

• lithospheric

• asthenospheric

• mesospheric

Continental crust is composed of ________ rocks.

• granitic

• basaltic

Oceanic crust is composed of ________ rocks.

• granitic

• basaltic

The area where a plate descends is a ____________.

• convergent boundary

• mid-ocean ridge

• subduction zone

• transform fault

The youngest material of the ocean floor is found at ______.

• mid-ocean ridges

• deep-sea trenches

• abyssal plains

• deep sea basins

Seafloor spreading occurs because __________.

• new material is being added to the asthenosphere

• earthquakes break apart the ocean floor

• sediments accumulate at the area of spreading

• molten material rises towards the surface

The crust under the continents is thinner than the crust under the ocean.

• true

• false

Continental plates are more dense than the oceanic plates.

• true

• false

Earthquakes and volcanoes are concentrated near plate boundaries.

• true

• false

The boundary between two plate that are moving apart is a ________ boundary.

• convergent

• transform

• divergent