Space

4. a small, dense, rocky planet similar to Earth (4 inner planets - Mercury, Venus, Earth, Mars)
7. mixture of gases that surround a planet
8. a small, rocky body that revolves around the sun
9. a force which tries to pull two objects toward each other
10. a natural satellite of a planet
11. a large, gaseous planet of the outer solar system with no known solid surface (4 outer planets - Jupiter, Saturn, Uranus, Neptune)
13. a body in space that lacks one or more characteristics of a planet
15. the motion of a planet as it travels in orbit around the Sun
17. a meteoroid that reaches Earth's surface/ground without burning up completely; it takes the 'right' path to Earth

1. body that orbits around the Sun or a star and does not produce its own light
2. a bright streak of light caused when a meteoroid or comet dust burns up in the atmosphere (people call it a 'shooting star' but it's not)
3. a very small, rocky body; mini asteroid
5. a medium sized star; the center of our solar system
6. the average distance between Earth and the Sun
12. the spin of an object in space
14. the elliptical path an object takes in space while revolving around another object
16. a small body of ice, rock and cosmic dust loosely packed together