Plate Tectonics

Front

What was Wegener's hypothesis called?

Back

The Continental Drift

Front

What causes the earth's plates to move and shift?

Back

Convection currents within the mantle.

Front

Which piece of evidence did Wegener use to prove continental drift?

Back

All of the above: The shape of the continents, Similar fossils found on separate continents, Tree fossils found in odd places.

Front

What is one of the fossils Wegener used to support his hypothesis of continental drift?

Back

Glossopteris

Front

What is the source of energy that drives plate movement?

Back

Convection currents in the asthenosphere.

Front

What is the theory that explains the movement of the Earth's plates?

Back

Plate Tectonics.

Front

What are tectonic plates?

Back

Large sections of the Earth's lithosphere that move and interact with each other.

Front

What is subduction?

Back

The process where one tectonic plate moves under another and sinks into the mantle.

Front

What is the asthenosphere?

Back

A semi-fluid layer of the mantle on which tectonic plates float.

Front

What is continental drift?

Back

The gradual movement of continents across the Earth's surface.