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- 1. Multiple ChoiceFaults are younger than the rocks they cut. True or FalseTrueFalse
- 2. Multiple ChoiceThe Law of Superposition is ________ dating.AbsoluteRelative
- 3. Multiple ChoiceWhich principle or law states that "the processes that shape the world today also operated in the past."UniformitarianismOriginal HorizontalityLateral ContinuitySuperposition
- 4. Multiple ChoiceWhich principle or law states that "When layers of sediments are deposited, they settle in flat, horizontal layers."UniformitarianismOriginal HorizontalityLateral ContinuitySuperposition
- 5. Multiple ChoiceWhat is the time needed for half of a sample of a radioactive substance to undergo radioactive decay?Half lifeIsotopeRadioactive decayNone of these
- 6. Multiple ChoiceScientists use radioactive decay to measure...relative timeabsolute timehalf-livestime of day
- 7. Multiple ChoiceThe original element that undergoes radioactive decay is known as the...daughter elementhalf-lifeparent elementcarbon-14
- 8. Multiple ChoicePrecambrian, Paleozoic, Mesozoic, and Cenozoic all belong to:EpochsErasPeriodsEons
- 9. Multiple ChoiceWhich division of the geologic time scale is the longest?EonPeriodEraEpoch
- 10. Multiple ChoiceThe earliest part of Earth's history is called the:CenozoicCambrianHolocenePrecambrian
- 11. Multiple ChoiceWhich is the correct order for the 3 eras on geologic time scale. This order is from oldest to current.Paleozoic, Mesozoic, CenozoicMesozoic, Paleozoic, CenozoicCenozoic, Mesozoic, Paleozoic
- 12. Multiple Choice
When is it speculated that Earth first formed?
~3.6 billion years ago
~4.6 million years ago
~4.6 billion years ago
Last Saturday
- 13. Multiple Choice
The Law of __________ tells us younger rocks are on top.Uniform-itarianismCongruityPositronicsSuperposition - 14. Multiple ChoiceWhat type of rock do fossils form in?IgneousSedimentaryMetamorphicClassic
- 15. Multiple ChoiceWhat type of rock do fossils form in?IgneousSedimentaryMetamorphicClassic
- 16. Multiple ChoiceWhat 2 things make a good index fossil?Good looks and a great smilewidespread and on Earth of a short timewidespread and on Earth for a long timeonly found in Clinton Twp and in every rock layer
- 17. Multiple Choice
What type of unconformity is shown between D and C in the figure?
nonconformity
disconformity
angular unconformity
uniformatarianism
- 18. Multiple Choice
A sample of a radioactive element has a mass of 80 g. How much parent and daughter materials are in the sample after two half-lives?
parent = 20 g; daughter = 60 g
parent = 80 g; daughter = 80 g
parent = 2; daughter = 1/2
parent = 60 g; daughter = 20 g
- 19. Multiple Choice
The discovery of fossilized coral reefs on land is evidence that
salt water changes coral into fossils.
the sea level has changed over time.
the reefs formed in a freshwater lake.
coral reefs can form on dry land.
- 20. Multiple ChoiceWhich of the following places the divisions of time in order from largest to smallest?epoch, period, era, eonperiod, era, epoch, eonera, eon, epoch, periodeon, era, period, epoch
- 21. Multiple ChoiceRadiometric dating is often referred to astotal age.absolute age.historic age.geologic age.
- 22. Multiple ChoiceA rock formed with 500 atoms of a radioactive parent element, but only contains 125 radioactive parent atoms today. If the half-life is 1000 years, how old is the rock?2000 years500 years250 years125 years
- 23. Multiple Choicethe time it takes for half the atoms in an element to decay into something else is calledabsolute age datingrelative age datinghalf-lifeextinct
- 24. Multiple ChoiceThe ______________ era covers almost 90% of earth's history.PaleozoicMesozoicCenozoicPrecambrian
- 25. Multiple ChoiceWhat percent of carbon-14 would be left after 5730 years?100%75%50%25%
- 26. Multiple ChoiceRelative dating of rock layers tells us that the deeper we dig, _______.the younger the rocks getthe smellier the rocks getthe harder the rocks getthe older the rocks get
- 27. Multiple ChoiceGaps in rock layers caused by erosion are calledlaw of superpositionunconformitiesuniformitarianismrelative dating
- 28. Multiple Choice
Which of the following is NOT an uncomformity
deposition stops after a supply of sediment is cut off
erosion moves layers
a break in geologic record
gravity causes sediment to form layers
- Answer choicesTagsAnswer choicesTags