Across
- 1. the outside or any one side of an object
- 2. what something is made of
- 5. Force a force which tries to pull two objects toward each other
- 7. Belt region between the inner planets and outer planets where thousands of asteroids are found orbitting around the Sun
- 8. Planet planets made up of mostly ice; Uranus and Neptune
Down
- 1. use resources without the resources running out
- 3. everything that exists including the Earth, planets, stars, space, and galaxies
- 4. System made up of the Sun and all of the smaller objects that move around it
- 5. Planet planet composed mostly of gases
- 6. the layer of gas that surrounds Earth