Chemistry CrossWord

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Across
  1. 2. He on the periodic table
  2. 4. filled with helium
  3. 6. Li on periodic table, found in batteries
  4. 7. large body of salt water
  5. 9. alien found on mars
  6. 12. university that conducted the experiment on coral
  7. 13. used to protect skin from the sun
Down
  1. 1. pale yellow filters found in UVA filters
  2. 2. U.S. island state
  3. 3. when color is removed from coral
  4. 5. name of the rover from mars
  5. 8. C on the periodic table
  6. 10. national aeronautics and space administration
  7. 11. 4th planet from the sun