Layers of the Earth Test Review

Front

The layer of hot, solid material between Earth's crust and core.

Back

Mantle

Front

The hypothesis that the continents slowly move across Earth's surface.

Back

Continental Drift

Front

The layer of rock that forms Earth's outer surface.

Back

Crust

Front

The innermost layer of the Earth.

Back

Core

Front

The soft layer of the mantle on which the lithosphere floats.

Back

Asthenosphere

Front

A device that determines the distance of an object under water, by using sound waves.

Back

Sonar

Front

The name of the single landmass that broke about 200 mil years ago, then broke apart.

Back

Pangaea

Front

The theory that pieces of the Earth are in constant motion, driven by convection currents in the mantle.

Back

Plate tectonics

Front

A deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle.

Back

Deep Ocean trench

Front

The process by which oceanic crust sinks beneath a trench.

Back

Subduction