Universe

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Across
  1. 4. most galaxies are _: some explosion caused movement
  2. 6. closest to the sun
  3. 7. gravity pulls this together
  4. 9. energy released when electrons attach to protons
  5. 10. plasma makes up this planet
Down
  1. 1. we are made from this
  2. 2. most abundant elements
  3. 3. largest planet in our solar system
  4. 5. nebula is dust gas and __ held together by gravity
  5. 6. farthest from the sun
  6. 8. when clumps of mass compress nuclear fusion