Big Bang Theory

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Across
  1. 2. You need this to survive
  2. 5. A theory that says our universe is expanding
  3. 6. Second element on the Periodic table
  4. 7. All mater and space that exists
  5. 8. The other name for the Crab Nebula
  6. 10. Something used to study light
Down
  1. 1. Particles of what all matter is composed of
  2. 3. Creator of the Theory of relativity
  3. 4. The third element on the periodic table
  4. 9. First element on the periodic table