Front

What do we call the layer of Earth that includes land and the ocean floor?

Back

Crust

Front

What is a break in Earth's crust along which rocks move?

Back

Fault

Front

What is the underground point where an earthquake first starts?

Back

Focus

Front

What layer of Earth do the tectonic plates move on?

Back

Mantle

Front

What forms new ocean floor as tectonic plates move apart?

Back

Volcanoes

Front

What is the term for the movement of the Earth's plates?

Back

Plate tectonics

Front

What is the name of the instrument used to measure earthquakes?

Back

Seismograph

Front

What is the molten rock that comes from a volcano called?

Back

Magma

Front

What do we call the solid outer layer of the Earth?

Back

Crust

Front

What is the term for the shaking of the ground during an earthquake?

Back

Seismic waves