Unit 1 Vocabulary Review

Front

Revolution

Back

The motion of a body that travels around another body in space, completing one trip along an orbit.

Front

Biosphere

Back

All the living things on Earth, including plants, animals, and humans.

Front

Gravity

Back

A force of attraction between objects that is due to their masses.

Front

Comet

Back

Chunks of ice and dust that travel through space and revolve around the sun in long, elliptical orbits.

Front

Galaxy

Back

A collection of stars, dust, and gas bound together by gravity.

Front

Rotation

Back

The spinning of a body on its axis.

Front

Axis

Back

An imaginary line around which a body rotates.

Front

Elliptical Orbit

Back

The oval-shaped path that an object takes as it revolves around another object in space.

Front

Meteor

Back

A small body of matter from outer space that enters the Earth's atmosphere.

Front

Meteorite

Back

A meteor that survives its passage through the Earth's atmosphere and lands on the surface.