Space Unit

5. A very young star that has not started fusion yet. The second step in the life of a star.
7. A compressed ball of hot gas in space.
8. A large cloud in space where stars are formed. The first step in the life of a star.
9. The right side of a chemical reaction. What we start with.
11. The color of star that is the hottest.
12. The left side of a chemical reaction. What we are making.
15. The first planet in the solar system.
16. The type of reaction where two things are broken apart.
19. The type of reaction where ONE element switches places.
20. The fourth planet in the solar system. Also known as "The Red Planet".

1. The sixth planet in the solar system. Known for its large rings
2. The eight planet in the solar system. Named after the Roman god of the sea.
3. A smaller object that orbits around a planet. The Earth has one.
4. The type of reaction where TWO elements switch places.
6. A large object moving in an orbit around a star. One example is the Earth.
10. The end of a stars life, where it collapses into something so dense, not even light can escape it.
13. The type of reaction where two things are combined.
14. The fifth planet in the solar system. Also the largest.
17. A large explosion caused when a particularly large star dies.
18. The second planet in the solar system. Named after the roman god of beauty and love
21. The color of star that is the coldest.