Unit 15 Review 1

3. Explosion from a star
6. The 'Surface' of the Sun that looks solid but is actually gas
10. This zone moves energy when warm gas rises while cooler gas sinks
12. The orange-red layer above the surface
13. A ball of gas held by gravity with fusion as source of energy
14. The outermost and hottest layer of a star
17. The outcome of stars that are 10x-20x the size of our Sun (combine two words

1. What scientists believe 90% of stars in universe are (combine two words)
2. This zone (also known as radiative) is where light energy passes between atoms
4. This color star has highest mass/temp/luminosity
5. The outcome of the heaviest stars over 20x our Sun's Mass (combine two words)
6. This kind of nebula forms around a white dwarf where new stars can form
7. The early stages when gas and dust get gravity
8. The exposed core of a star that is up to 10x the mass of our sun (combine two words)
9. Innermost layer of star where fusion occurs
11. This shockwave from a supernova sends out heavy elements into space (2nd half of phrase)
15. This color star has lowest mass/temp/luminosity
16. Merging of smaller atoms into heavier ones releasing energy
18. Collection of gas and dust where stars are created