# Absolute Dating In this part of the exercise, you will be ca

Absolute Dating In this part of the exercise, you will be ca.
Absolute Dating In this part of the exercise, you will be calculating the actual, or absolute, ages of the rock. The figure above shows the relationship between the percentage of parent material and the number of half-lives that have passed. 4. What percentage of the parent material is present after one half-life? Two? Three? Four? 5.If you start with 80 grams of an isotope, how much would be left after-one half-life? What about three half-lives? 6.If an isotope has a half-life of 600 million years, how old is a rock that contains the isotope after 50% of the parent has decayed? How old is the rock after four half-lives have passed? 7.You discover the parent isotope in a lava flow has gone through 0.75 half-lifes.If a half-life is 800 million years, how old is that rock? 8.In number 1, at the beginning of the exercise, Layer F was dated at 260 million years old.Layer E was determined to be 235 million years old.When did the fold occur?Tags: Geology Science Rocks geo101l_lab2_sequence.docxUnformatted Attachment Preview1. Observe this block diagram. Place events in order of occurrence in the respective places below.Work from oldest to youngest, bottom to top. Be sure to note any unconformities and their types.16.15.14. H13. A12. L11. E10. F9. K8. C7. G6. I5. J4. D3. M2. B1. N2. Observe the block diagram above. Place events in order of occurrence in the respective placesbelow. Work from oldest to youngest, bottom to top. Be sure to note any unconformities and theirtypes.13. D12. I11. B10. Angular Unconformity9. K8. E7. A6. F5. Nonconformity4. H3. C2. J1. Gir3. Observe the block diagram above. Place events in order of occurrence in their respective placesbelow. Work from oldest to youngest, bottom to top. Be sure to note any unconformities and theirtypes.28. I27. Fault26. G25. fold24. S23. O22. 121. Fault20. B19. R18. Fold17. F16. N15. disconformity14. U13. J12. D11. Q10. A9. T8. Angular Unconformity7. M6. C5. H4. K3. P2. Nonconfomity1. EAbsolute DatingIn this part of the exercise, you will be calculating the actual, or absolute, ages of therock.The figure above shows the relationship between the percentage of parent materialand the number of half-lives that have passed.4. What percentage of the parent material is present after one half-life?Two?Three?Four?5. If you start with 80 grams of an isotope, how much would be left after-one halflife?What about three half-lives?6. If an isotope has a half-life of 600 million years, how old is a rock that containsthe isotope after 50% of the parent has decayed?How old is the rock after four half-lives have passed?7. You discover the parent isotope in a lava flow has gone through 0.75 half-lifes. Ifa half-life is 800 million years, how old is that rock?8. In number 1, at the beginning of the exercise, Layer F was dated at 260 millionyears old. Layer E was determined to be 235 million years old. When did the foldoccur?9. The image to the left show aseries of sections containingvarious fossils. If the star is 325million years old (ma), and theheptagram (the 7-sided fossil) is337 ma, how old is the 15-sidedfossil in between?If the star existed for threemillion years, from 324ma327ma, how old must the archedarrow in section three be?10. Based on what you learned about fossil preservation, how might the followingbe preserved as fossils?Dinosaur bones?Microscopic organisms like bacteria and protists?Skin or feathers?DNA? Purchase answer to see fullattachment
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