Space Unit Review

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Across
  1. 1. The theory that the Universe began from a small point and has been expanding outward
  2. 5. The _____ of a star determines what life cycle it goes through and what elements it makes
  3. 9. A cloud of hydrogen gas where stars are born from
  4. 10. These types of stars can create heavy elements all the way up to Iron
  5. 12. The Sun fuses Hydrogen atoms to make this
  6. 13. The Sun turns into this after it runs out of Hydrogen
Down
  1. 2. The process that powers the Sun
  2. 3. One of the elements that make up 98% of the Universe
  3. 4. When galaxies are moving away from us, the light from them are _______
  4. 6. An explosion that happens when a massive stars dies, creating many heavy elements
  5. 7. The leftover heat from the initial explosion of the Big Bang is called Cosmic Background __________
  6. 8. The layer where nuclear fusion occurs in the Sun
  7. 11. The other element that make up 98% of the Universe