Plate Tectonics Review

Plate Tectonics

Theory that Earth’s outer shell is divided into large slabs of solid rock, called “plates,” that glide over Earth’s mantle

Crust

Solid outermost layer of Earth.

What are the two types of crust?

Oceanic (thinner & more dense) and continental (thicker & less dense)

The mantle is

solid

The lithosphere is

rocky outer part

The lithosphere includes

the crust and the uppermost part of the mantle

The outer core is

liquid

The inner core is

solid

The asthenosphere is

the part of the mantle just below the lithosphere

Which part of the Earth is very slow moving?

The asthenosphere

Which part of the Earth is the semi solid part of the mantle?

The asthenosphere

Convection currents in the asthenosphere:

Move the lithospheric plates resulting in plate tectonics

A subduction zone is

the collision between two of Earths tectonic plates, where one plate sinks into the mantle underneath the plate.