Test Review 12/8
- 1. Review QuestionsChapter 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 timeUniformitarianism
- 3. This branch of Earth Science studies the history of the EarthEarth 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 anotherFault
- 8. Molten rock from Earth’s interior that squeezes into existing rock layers and coolsIntrusion
- 9. This type of rock disturbance occurs when rock layers bend and buckle from Earth’s internal forcesFolding
- 10. This disturbance occurs when internal forces in the earth slant rock layers without folding themTilting
- 11. Hardened tree sap that sometimes has the preserved remains of insectsAmber
- 12. The number of years an object has existedAbsolute Age
- 13. Remains or traces of animals or plants that lived in past geologic timesFossils
- 14. This occurs when an organism’s tissues are completely replaced by mineralsPetrification
- 15. Any naturally preserved evidence of an animal’s activityTrace 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 themCoprolite
- 17. An empty space/cavity in rock where a plant or animal was buriedMold
- 18. A replica of an object that is created when sediment fills a mold and becomes rockCast
- 19. The boundary between a set of tilted rock layers and a set of horizontal layersAngular Unconformity
- 20. Atoms of the same element that have different numbers of neutronsIsotopes
- 21. Fossils of organisms that lived during a short, well-defined time span and are only found in rock layers of a particular geologic ageIndex Fossils
- 22. The earth’s age, according to geologists4.6 Billion years old
- 23. The law that states that faults/intrusions are always younger than the rock layers they cut throughLaw of Crosscutting Relationships
- 24. Saying one rock is older or younger than another rock but not saying its age in yearsRelative Age
- 25. Principle that states that sedimentary rocks left undisturbed will remain in horizontal layersPrinciple of Original Horizontality
- 26. A break in the geologic rock recordUnconformity
- 27. List 3 methods of absolute dating besides Radiometric DatingRates of ErosionRates of DepositionVarve Count
- 28. List two reasons Radiometric Dating is the most accurate methodDoesn’t depend on EnvironmentRates don’t vary over time
- 29. The original radioactive isotopeParent Isotope
- 30. The newly formed, more stable isotope that forms during radioactive decayDaughter Isotope
- 31. The time it takes for ½ the mass of parent isotope to decay into its daughter isotopeHalf 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 Parent14 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 oldUranium 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 youngCarbon-14
- 35. Sue was found in this stateSouth Dakota
- 36. Sue was the most _______ T.rex ever foundComplete
- 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