plate tectonics

Front

What causes Earth's tectonic plates to move?

Back

Convection currents in the mantle.

Front

How do scientists estimate the thickness of each layer of the Earth?

Back

By studying seismic waves.

Front

What was the name of the giant landmass that existed 200 million years ago?

Back

Pangaea.

Front

Which of the following is NOT evidence to support the theory of plate tectonics?

Back

Sand Erosion.

Front

What is the name of the ancient supercontinent formed 280 million years ago?

Back

Pangaea.

Front

What are tectonic plates?

Back

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

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 subduction?

Back

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

Front

What is a divergent boundary?

Back

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