Physical Science (12th Edition), Standalone Book
12th Edition
ISBN: 9781260150544
Author: Bill W. Tillery
Publisher: McGraw Hill Education
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Question
Chapter 21, Problem 42AC
To determine
The earliest abundant fossils found in era from the following options:
Cenozoic.
Mesozoic.
Paleozoic.
Phanerozoic.
Expert Solution & Answer
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Check out a sample textbook solutionStudents have asked these similar questions
1. What is relative dating?
2. What is the law of superposition?
3. What is the law of original horizontally?
Radiocarbon dating technique is used to estimate the age of:
A. rocks
B. monuments
C. soil
D. fossils
What describes using organisms that were only alive during a specific time period to estimate the unknown age of items?
a.
Radioactive dating
Selected:b.
Law of superposition
This answer is incorrect.
c.
Relative dating
d.
Index fossils
Chapter 21 Solutions
Physical Science (12th Edition), Standalone Book
Ch. 21 -
1. Evidence of former life is called...Ch. 21 -
2. In the early 1800s, William Smith noted that...Ch. 21 - Prob. 3ACCh. 21 -
4. The meaning of the word fossil is
a. petrified...Ch. 21 - Prob. 5ACCh. 21 - Prob. 6ACCh. 21 -
7. Fossils are most often found in what type...Ch. 21 - Prob. 8ACCh. 21 - Prob. 9ACCh. 21 - Prob. 10AC
Ch. 21 -
11. Distinctive fossils of plants or animals that...Ch. 21 - Prob. 12ACCh. 21 - Prob. 13ACCh. 21 - Prob. 14ACCh. 21 - Prob. 15ACCh. 21 - Prob. 16ACCh. 21 - Prob. 17ACCh. 21 - Prob. 18ACCh. 21 - Prob. 19ACCh. 21 - Prob. 20ACCh. 21 - Prob. 21ACCh. 21 - Prob. 22ACCh. 21 - Prob. 23ACCh. 21 - Prob. 24ACCh. 21 - Prob. 25ACCh. 21 -
26. Which of the basic guiding principles used to...Ch. 21 - Prob. 27ACCh. 21 - Prob. 28ACCh. 21 -
29. Correlation and relative dating of rock units...Ch. 21 - Prob. 30ACCh. 21 -
31. You would expect to find the least number of...Ch. 21 - Prob. 32ACCh. 21 - Prob. 33ACCh. 21 - Prob. 34ACCh. 21 -
35. An early record about the discovery of...Ch. 21 - Prob. 36ACCh. 21 - Prob. 37ACCh. 21 -
38. A geologic feature that cuts across or is...Ch. 21 - Prob. 39ACCh. 21 - Prob. 40ACCh. 21 - Prob. 41ACCh. 21 - Prob. 42ACCh. 21 - Prob. 43ACCh. 21 - Prob. 44ACCh. 21 - Prob. 45ACCh. 21 - Prob. 46ACCh. 21 -
1. What is the principle of uniformity? What are...Ch. 21 -
2. What is the geologic time scale? What is the...Ch. 21 -
3. Why does the rock record go back only 3.8...Ch. 21 -
4. Do igneous, metamorphic, or sedimentary rocks...Ch. 21 -
5. What major event marked the end of the...Ch. 21 -
6. Briefly describe the principles and...Ch. 21 - Prob. 7QFTCh. 21 -
8. Describe how the principles of superposition,...Ch. 21 - Prob. 9QFTCh. 21 - Prob. 10QFTCh. 21 -
11. Describe some of the things that fossils can...Ch. 21 -
1. Analyze the significant reasons that a pot...Ch. 21 - Prob. 2FFACh. 21 -
4. What are the significant differences between...Ch. 21 -
5. Summarize why the different blocks of time...Ch. 21 - Prob. 5FFACh. 21 -
6. The history of Earth has been one of many...Ch. 21 - Prob. 1PEACh. 21 - Prob. 2PEACh. 21 - Prob. 3PEACh. 21 - Prob. 4PEACh. 21 - Prob. 5PEACh. 21 - Prob. 6PEACh. 21 - Prob. 7PEACh. 21 - Prob. 8PEACh. 21 - Prob. 9PEACh. 21 - Prob. 10PEACh. 21 - Prob. 11PEACh. 21 - Prob. 12PEACh. 21 - Prob. 13PEACh. 21 - Prob. 14PEACh. 21 - Prob. 15PEACh. 21 -
1. A sequence of deep marine shale that spans the...Ch. 21 - Prob. 2PEBCh. 21 - Prob. 3PEBCh. 21 -
4. The absolute age of a rock is its age in...Ch. 21 -
5. The absolute age (age in years) of sedimentary...Ch. 21 -
6. A sequence of rocks consists of a flat-lying...Ch. 21 -
7. A student examining a roadcut excavated...Ch. 21 - 8. A cliff has the following sequence...Ch. 21 - Prob. 9PEBCh. 21 - Prob. 10PEBCh. 21 - Prob. 11PEBCh. 21 - Prob. 12PEBCh. 21 - Prob. 13PEBCh. 21 - Prob. 14PEBCh. 21 -
15. Two outcrops separated by a distance of 32 km...
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- The diagram below shows the layers of rock having an ammonite: Which statement about the rock fossils is true? (4 points) a Fossil Y is older than fossil X. b Fossil Z is younger than fossil Y. c Fossil Z existed over many periods of time. d Fossil Y existed during the same period as the ammonite.arrow_forwardSuppose that one species of index fossil lived between 410 and 380 mya and another lived between 440 and 350 mya. What can be said about the age of a rock that contains fossils of both species? Figure 24.22 Absolute Dating of Sedimentary Rocks See Exercise 7.arrow_forwardFrom Hawaii to the bend in the Hawaiian-Emperor chain is about 4000 km. Use the speed of Pacific plate motion given in Problem 7 to estimate how long ago the direction of plate motion changed. (Note: It may not be a coincidence that the San Andreas fault became active in what is now Southern California at about the same time.) 7. The Hawaiian-Emperor chain of undersea volcanoes is about 7500 km long, and the Pacific plate is moving 9.2 cm a year. How old is the oldest detectable volcano in the chain? What has happened to older volcanoes in the chain?arrow_forward
- Metamorphic rock shows that only 25% of its original potassium-40 remains. What is the minimum age of the rock? The half-life of K-40 is 1.3 billion years.arrow_forward1. Answer the following questions about porosity and permeability: a) Name three (3) parameters which are involved in calculation of porosity. b) Name four geological mechanisms affecting porosity values. c) Describe effect of sorting on porosity.arrow_forwardHow does physics apply to these geological processes (volcanic eruptions, mountain formation, deposition)? Please explain.arrow_forward
- KEY TERMS 1. geologic time (Intro) 2. fossil (24.1) 3. paleontology 4. amber 5. replacement fossil 6. mold 7. cast 8. trace fossil 9. relative geologic time (24.2) 10. principle of original horizontality 11. principle of superposition 12. principle of cross-cutting relationships 13. unconformities 14. correlation 15. index fossils 16. eons 17. eras 18. periods 19. absolute (numerical) geologic time (24.3) 20. radiometric dating 21. carbon-14 dating 22. geologic time scale (24.5) 23. Cambrian explosion 24. Great Dying 25. epochs 26. K-T event For each of the following items, fill in the number of the appropriate Key Term from the preceding list. a. _____ Widespread, easily identified fossils that are typical of a particular time segment of the Earths historyarrow_forwardKEY TERMS 1. geologic time (Intro) 2. fossil (24.1) 3. paleontology 4. amber 5. replacement fossil 6. mold 7. cast 8. trace fossil 9. relative geologic time (24.2) 10. principle of original horizontality 11. principle of superposition 12. principle of cross-cutting relationships 13. unconformities 14. correlation 15. index fossils 16. eons 17. eras 18. periods 19. absolute (numerical) geologic time (24.3) 20. radiometric dating 21. carbon-14 dating 22. geologic time scale (24.5) 23. Cambrian explosion 24. Great Dying 25. epochs 26. K-T event For each of the following items, fill in the number of the appropriate Key Term from the preceding list. b. _____ The most devastating extinction that has ever occurredarrow_forwardréptilés d. all) of these 7. The development of ozóne in the stratosphere and oxygen in the atmosphere first made possible the development of a. complex organisms b. single-cell organisms c. cyanobacteria d. all of these 8. Today, many scientists think that a. 'birds evolved from dinosaurs b. dinosaurs evolved from reptiles c. birds evolved from amphibians d. both a andb 9. Ediacaran organisms first appeared during the a. Precambrian Time b. Cambrian Period c. Permian Period d. none of these 10. As a. cyanobacteria b. trilobites evolved, they changed Earth's atmosphere by producing oxygen. c. reptiles d. dinosaurs Geologic Timearrow_forward
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