Flashcard: Planet Earth, Vocab

Front

Thin layer of gases surrounding Earth.

Back

atmosphere

Front

Watery areas of Earth, including oceans, lakes, rivers, etc.

Back

hydrosphere

Front

Part of Earth where life exists

Back

biosphere

Front

Part of a continent extending under the ocean

Back

continental shelf

Front

Uppermost layer of Earth including crust, continents, and ocean basins.

Back

Lithosphere

Front

A globe-shaped body

Back

Sphere

Front

A principle explaining observed facts

Back

theory

Front

Move in a circle on a central axis.

Back

revolve

Front

A line through the center of a circle or sphere.

Back

diameter

Front

A long, narrow ditch

Back

trenche