Physical Science C

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Across
  1. 3. numeric age of rocks
  2. 6. the guy who figured it all out
  3. 8. the half life
  4. 9. glaciers that cover large parts of earths surface something we all life on
  5. 10. mass of a star
  6. 12. When protons and Neutrons form together
  7. 18. continents that are big
Down
  1. 1. When a star begins to run out of fuel
  2. 2. the rock layer
  3. 4. Made lakes, Hills, and streams
  4. 5. How to tell if an object is moving
  5. 7. How the Universe Began
  6. 11. When elements join together to form heavier elements elements that are heavy
  7. 13. long distinct time period
  8. 14. long span of geological time
  9. 15. when everything is extinct
  10. 16. a time period
  11. 17. when the weather swtiches