Test Review 12/8


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Review Questions from class on Tuesday, December 8th.

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Test Review 12/8

  1. 1. Review Questions<br />Chapter 8: Relative Dating, Absolute Dating, Fossils<br />
  2. 2. This principle states that geologic processes are the same today as they were in the past but the RATES of the processes vary over time<br />Uniformitarianism<br />
  3. 3. This branch of Earth Science studies the history of the Earth<br />Earth Science<br />
  4. 4. What does a Paleontologist study?<br />Fossils<br />
  5. 5. When you determine whether an object or event is older or younger than other objects/events, you are finding the object’s ___________ Age.<br />Relative<br />
  6. 6. This law states that younger rocks lie above older rocks in undisturbed rock layers.<br />Superposition<br />
  7. 7. A break in the earth’s crust along which blocks of crust slide relative to one another<br />Fault<br />
  8. 8. Molten rock from Earth’s interior that squeezes into existing rock layers and cools<br />Intrusion<br />
  9. 9. This type of rock disturbance occurs when rock layers bend and buckle from Earth’s internal forces<br />Folding<br />
  10. 10. This disturbance occurs when internal forces in the earth slant rock layers without folding them<br />Tilting<br />
  11. 11. Hardened tree sap that sometimes has the preserved remains of insects<br />Amber<br />
  12. 12. The number of years an object has existed<br />Absolute Age<br />
  13. 13. Remains or traces of animals or plants that lived in past geologic times<br />Fossils<br />
  14. 14. This occurs when an organism’s tissues are completely replaced by minerals<br />Petrification<br />
  15. 15. Any naturally preserved evidence of an animal’s activity<br />Trace Fossil<br />
  16. 16. A type of trace fossil that is made from preserved animal feces or dung & can provide information about the habits/diet of animals that left them<br />Coprolite<br />
  17. 17. An empty space/cavity in rock where a plant or animal was buried<br />Mold<br />
  18. 18. A replica of an object that is created when sediment fills a mold and becomes rock<br />Cast<br />
  19. 19. The boundary between a set of tilted rock layers and a set of horizontal layers<br />Angular Unconformity<br />
  20. 20. Atoms of the same element that have different numbers of neutrons<br />Isotopes<br />
  21. 21. Fossils of organisms that lived during a short, well-defined time span and are only found in rock layers of a particular geologic age<br />Index Fossils<br />
  22. 22. The earth’s age, according to geologists<br />4.6 Billion years old<br />
  23. 23. The law that states that faults/intrusions are always younger than the rock layers they cut through<br />Law of Crosscutting Relationships<br />
  24. 24. Saying one rock is older or younger than another rock but not saying its age in years<br />Relative Age<br />
  25. 25. Principle that states that sedimentary rocks left undisturbed will remain in horizontal layers<br />Principle of Original Horizontality<br />
  26. 26. A break in the geologic rock record<br />Unconformity<br />
  27. 27. List 3 methods of absolute dating besides Radiometric Dating<br />Rates of Erosion<br />Rates of Deposition<br />Varve Count<br />
  28. 28. List two reasons Radiometric Dating is the most accurate method<br />Doesn’t depend on Environment<br />Rates don’t vary over time<br />
  29. 29. The original radioactive isotope<br />Parent Isotope<br />
  30. 30. The newly formed, more stable isotope that forms during radioactive decay<br />Daughter Isotope<br />
  31. 31. The time it takes for ½ the mass of parent isotope to decay into its daughter isotope<br />Half Life<br />
  32. 32. If you have 16 g of radioactive parent isotope, how much parent/daughter isotope will you have after 3 half lives?<br />2 g of Parent<br />14 g of Daughter<br />
  33. 33. This parent isotope decays into Lead-206, has a half life of 4.5 billion years, and is used to date rock that is really old<br />Uranium 238<br />
  34. 34. This parent isotope decays into Nitrogen-14, has a half life of 5,730 years, and is used to date rock that is relatively young<br />Carbon-14<br />
  35. 35. Sue was found in this state<br />South Dakota<br />
  36. 36. Sue was the most _______ T.rex ever found<br />Complete<br />
  37. 37. WHO was Sue the T.rex named after?<br />The woman who found her<br />
  38. 38. Who bought Sue and for how much?<br />Chicago’s Field Museum<br />$8 Million<br />