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Test Review 12/8

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Review Questions from class on Tuesday, December 8th.

Review Questions from class on Tuesday, December 8th.

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