Front

What is the solar system?

Back

The sun, planets, and all other objects that orbit the sun

Front

What are the two main gases in the atmosphere?

Back

Nitrogen & Oxygen

Front

Define - Atmosphere

Back

Layers of gases that surround the earth

Front

What is the composition of most comets?

Back

ice, dust, rock, gases

Front

What is another name you could call a comet?

Back

dirty snowball

Front

Define the "universe."

Back

All matter and energy in existence. This is like a giant container of all the galaxies.

Front

The sun and all of the planets and other bodies that travel around it.

Back

Solar System

Front

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

Back

Galaxy

Front

Gravity is the force objects put on each other because of their ______.

Back

mass

Front

________ holds all of the planets in orbit around the sun.

Back

Gravity