Earth Science Terms

Front

Sphere

Back

A ball shaped with all points on the earth's surface at an equal distance from the center.

Front

Geosphere

Back

The solid part of the earth.

Front

Gravity

Back

An attractive force that exists between all objects that have mass.

Front

Density

Back

The mass per unit volume of a substance.

Front

Crust

Back

The brittle, rocky outer layer of Earth.

Front

Mantle

Back

The thick middle layer in the solid part of earth.

Front

Lithosphere

Back

The rigid outermost layer of earth that includes the uppermost mantle and crust.

Front

Asthenosphere

Back

The partially melted portion of the mantle below the lithosphere.

Front

Core

Back

The dense metallic center of earth.

Front

Magnetosphere

Back

The outer part of earth’s magnetic field that interacts with charged particles.