3rd Quarter Review

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Across
  1. 2. Most broad classification group
  2. 6. Dating technique for rocks and fossils giving a close to absolute age
  3. 7. Body system containing the lung
  4. 10. These 2 classification groups make up an organisms name
  5. 13. A physical trait that may lead to the extinction or survival of an organism
  6. 15. Columns on a periodic table
  7. 17. Amount of time it takes half of the radioactive elements in a fossil to decay
  8. 18. Law of _______ states younger fossils are above older fossils
Down
  1. 1. Most specific classification group
  2. 2. Body system breaking down food
  3. 3. How a species changes over time
  4. 4. Survival of the fittest
  5. 5. Rows on a periodic table
  6. 8. Body system with blood, vessels, and the heart
  7. 9. Body system getting rid of waste
  8. 11. 3/4 of all elements found on the left side of the periodic table
  9. 12. Formed from multiple atoms joined together
  10. 14. Has a cell with a nucleus and other organelles
  11. 16. Remains of a once living organisms
  12. 19. Their cell does not have a nucleus (bacteria)