Earth Layers and Plate Boundaries

Front

What does the theory of continental drift state?

Back

The continents were once joined in a super-continent and have moved over time.

Front

Which layer of the Earth is ALL solid iron and nickel?

Back

Inner core.

Front

What is a convergent boundary?

Back

A boundary where two tectonic plates move towards each other, often causing one plate to be forced below the other.

Front

How do Earth's plates behave?

Back

They are constantly moving and changing the face of the earth.

Front

What occurs during sea floor spreading?

Back

Molten material rises up from the mantle at the mid-ocean ridges.

Front

What is the outer core primarily made of?

Back

Liquid iron and nickel.

Front

What is a divergent boundary?

Back

A boundary where two tectonic plates move away from each other, often creating new crust.

Front

What is a transform boundary?

Back

A boundary where two tectonic plates slide past each other horizontally.

Front

What is the lithosphere?

Back

The rigid outer layer of the Earth, consisting of the crust and upper mantle.

Front

What is the asthenosphere?

Back

The semi-fluid layer of the mantle beneath the lithosphere that allows tectonic plates to move.