Chapter 10

4. The universe is constantly ______
6. Our galaxy contains about 100 ______ stars
7. Asteroids, meteors and comets
9. A large star explodes, then collapses past the pulsar stage into a ______ ______
13. Jupiter, Saturn, Uranus and Neptune
14. The shift of light into the red end of the spectrum caused by an object moving away from the observer
16. Amino acids combine to form the ______ that make up living things
18. A series of actions repeated in the same order every time

1. Mercury, Venus, Earth and Mars
2. The explosion of a high-mass star
3. The sudden expansion of all the matter in the universe
5. Low-medium mass stars cool down ad swell up into ______ ______
8. Harold Urey and Stanley Miller placed hydrogen, methane, ______ and water into a flask and sent an electric spark through it to try and create amino acids
10. One of the gases that composed most of the nebula that formed our solar system
11. The life cycle of a star depends greatly on the star's ______
12. The study of the origin and changes of the universe
15. The point in time when the entire universe was contained in a tiny volume that was extremely hot and dense
17. All stars begin their lives in a ______