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- 1. Multiple ChoiceThe Law of Superposition helps scientists to determine what?The absolute age of rock layersThe age of fossilsThe relative age of rock layersthe super powers of rocks
- 2. Multiple ChoiceHow old do Paleontologists believe the Earth is?2015 years old3.6 billion years old4.6 billion years old4.6 million years old
- 3. Multiple Choice
According to the law of superposition, the oldest fossils are foundAt the top of the rock layersNear the bottom of the rock layersIn the middle of the rock layersSomewhat near the surface - 4. Multiple ChoiceWhat can scientists learn from the sequence of rock layers?Geologic history of that areaFuture geological eventsthe number of organisms that live in the areathe impact that hikers have had on an area.
- 5. Multiple ChoiceWhich rock layer in the diagram seems to be the oldest?FEBA
- 6. Multiple ChoiceIf an index fossil is found in two rock layers that are separated by an ocean, what do you know about the relationship between the two rock layers?they are about the same agethey used to be in the same areathe are made of the same kind of rockthe rock layers are unrelated
- 7. Multiple ChoiceWhich type of dating method can be used on rock layers by applying the Law of Superposition?relative datingabsolute datingradioactive datingradiometric dating
- 8. 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
- 9. Multiple ChoiceWhich of the following is the oldest?Layer LIntrusion DIntrusion HLayer E
- 10. Multiple ChoiceWhat happens during radioactive decay?A stable isotope of one element changes into an unstable isotope of a different elementA stable isotope of one element changes into an unstable isotope of the same elementAn unstable isotope of one element changes into a stable isotope of a different elementAn unstable isotope of one element changes into a stable isotope of the same element
- 11. Multiple ChoiceHow many of the original atoms of a decaying isotope remain unchanged after three half-lives?three-halvesthree-quartersone-quarterone-eighth
- 12. Multiple ChoiceThe Principle of Cross-Cutting Relationships states that an igneous intrusion isalways younger than the layers it cuts acrossalways older than the layers it cuts acrossthe same age as the rock it meltednone of the answers are correct
- 13. Multiple ChoiceWhich of the following correctly lists the layers in order from oldest to youngest?A, B, C, D, EE, B, C, D, AE, D, C, B, AC, B, A, D, E
- 14. Multiple ChoiceWhat is the oldest layer in the outcrop?BCDE
- 15. Multiple ChoiceWhat is the youngest layer in the outcrop?ABCD
- 16. Multiple ChoiceThe rock formation labeled "P" is a(n)...faultintrusioninclusionunconformity
- 17. Multiple ChoiceLetter "F" is a....inclusionintrusionfaultunconformity
- 18. Multiple ChoiceLetter "A" is an....inclusionintrusionfaultunconformity
- 19. Multiple ChoiceThe length of time required for half of the radioactive atoms in a sample to decay is its...eraagehalf-lifeeon
- 20. Multiple ChoiceScientists use radioactive decay to measure...relative timeabsolute timehalf-livestime of day
- 21. Multiple ChoiceA rock formed with 1000 atoms of a radioactive parent element, but only contains 250 radioactive parent atoms today. If the half-life of the parent element is one million years, how old is the rock?250,000 years old500,000 years old1,000,000 years old2,000,000 years old
- 22. Multiple ChoiceWhat element is usually used to date fossils?uranium-235carbon-14mercury-203thorium-234
- 23. Multiple ChoiceWhich element is usually used to date rocks?Carbon-14Nitrogen-12Uranium-238Oxygen-18
- 24. Multiple ChoiceWhich is not a property of the organisms that have become useful index fossils?The organisms existed for a relatively short period of timeThe organisms existed over a large areaThe organisms were abundant when they existedThe organisms still exist today
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