Earth's Layers and Plate Tectonics

Front

What is the least dense layer of the Earth?

Back

Crust

Front

Where can convection currents, the driving force of tectonic plates, be found?

Back

Mantle

Front

True or False: Ocean trenches always form at subduction zones where dense oceanic crust subducts.

Back

True

Front

Which layer of Earth is characterized by rock that is plastic, or soft enough to flow?

Back

Asthenosphere

Front

Is the outer core a liquid or solid?

Back

Liquid

Front

What is the outermost layer of the Earth called?

Back

Crust

Front

What is the layer beneath the crust that is solid and rigid?

Back

Lithosphere

Front

What is the term for the movement of tectonic plates?

Back

Plate tectonics

Front

What is the layer of the Earth that is liquid and surrounds the inner core?

Back

Outer core

Front

What geological feature is formed at divergent boundaries?

Back

Mid-ocean ridges