Plate Tectonics Modified

Front

What is Pangaea?

Back

The name of the supercontinent that existed millions of years ago.

Front

What is a transform boundary?

Back

A place where two tectonic plates slip past each other, moving in opposite directions.

Front

What technology did scientists use in the mid-1900s to map the mid-ocean ridge?

Back

Sonar.

Front

What is a fossil?

Back

Any trace of an ancient organism that has been preserved in rock.

Front

What causes the movement of Earth’s plates?

Back

Convection currents in the mantle.

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.

Front

What is a divergent boundary?

Back

A tectonic plate boundary where two plates move away from each other.

Front

What is subduction?

Back

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

Front

What are tectonic plates?

Back

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