Earth History Vocab

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Across
  1. 6. when soil and rock are broken down from a natural force
  2. 7. the age of something in comparison to another thing
  3. 11. the process in which organisms change over time to better fight their habitat
  4. 14. the change in characteristics of lifeforms over generations
  5. 15. the change in the earths physical features
  6. 17. the process of earths surface being worn down
  7. 18. rocks made of particles of rock
  8. 20. the chronological dating of geological events
  9. 21. a scientist who studies fossils
Down
  1. 1. different parts of the geological time scale
  2. 2. the theory that the earths crust is separated into parts that are called plate tectonics
  3. 3. the exact age that something is
  4. 4. when magma moves down through the cracks in the earths crust
  5. 5. the difference of dna in organisms
  6. 8. the theory that organisms change over time
  7. 9. a period of time that is separated into periods
  8. 10. the rule that states that the top layer of rock is the youngest and the bottom layer is the oldest
  9. 12. rocks made from the cooling of lava
  10. 13. remains or imprints of plants or animals who lived in the past
  11. 16. fossils used to date things from the past
  12. 19. when magma moves from the inside to the outside of the earths crust