Unit 3 Crossword - RJM (Passcode: RJM)

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Across
  1. 7. the process of sediment moving back toward to the sea as sea levels fall
  2. 8. rare metal found in rocks on Earth but common in asteroids
  3. 10. All organisms and their environments on Earth
  4. 13. Loss of trees in a large widespread area
  5. 14. upright posture of humans
  6. 18. Keeps the majority of UV radiation away
  7. 19. the actual dating an object based on it’s radioactive decay
  8. 20. microscopic organisms at the base of marine food chain
  9. 24. Includes all water on Earth, Fresh and Salt.
  10. 26. The process where an organism better adapted to their environment survives and produces more offspring
  11. 29. the relationship between organisms and their environments
  12. 30. An change in an organisms structure or function that results from natural selection where the organism becomes better fitted to survive and produce offspring.
Down
  1. 1. the relationship between different organisms where both organisms benefit from the relationship
  2. 2. the principle that rock fragments in a layer are older than the rock layer it is in.
  3. 3. Modern Humans who inhabited Earth at the time of the Ice Age
  4. 4. the process of clay sediment moving on top of old beach as sea levels rise
  5. 5. help regulate climate, dilute pollutions, house marine line
  6. 6. organisms that do not contain nuclei
  7. 9. helps with agriculture, transportation, recreation, and nutrition
  8. 11. principle that in undisturbed rock sequences, the oldest rocks are on the bottom and each layer up is newer than the last.
  9. 12. are mostly made of water and need water to maintain healthy, proper life functions
  10. 15. use of tree rings to determine absolute age.
  11. 16. the ancient geographic setting of an area
  12. 17. Fossil records indicate oxygen arrived through tiny organisms called _________
  13. 21. largest mass extinction (marine life and terrestrial life)
  14. 22. The matching of rock types and fossils from one geographic region to another
  15. 23. The process where organisms have developed and diversified from earlier forms during the history of the Earth.
  16. 25. The solid parts of earth
  17. 27. group of reptiles including dinosaurs and crocodilians
  18. 28. organisms containing nuclei