5.8D

Earth, Sun, and Moon

Moon

A natural satellite that orbits a planet; some

planets have no moons; others have over 60

moons.

Craters

Bowl-shaped indents or cavities on the surface of a planet, moon, or asteroid that are caused by a collision with another object, such as a meteorite.

Sun

The star at the center of our solar system that supplies heat and light to Earth; its enormous gravity keeps the solar

system in orbit.

Weight

The heaviness of an object; force of

gravity on mass=weight

Revolution

•Making a complete turn around another object.

Satellite

• An object that revolves around a larger object in space.

Tide

•The rise and fall of the water in the ocean.

Moon Phases

•What the moon looks like at different times of the month.

Model

•A representation of something found in real life.

Planet

•A round body in space made of rocks and gases.

Galaxy

• A large group of stars. Our galaxy is the Milky Way with billions of stars; spiral shape.