BIOLOGY -TEXT
14th Edition
ISBN: 9781260710878
Author: Mader
Publisher: RENT MCG
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Chapter 18.2, Problem 1CYP
Determine the age of a fossil that contains 25% of its original14C.
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BIOLOGY -TEXT
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- The fossils in line 4 are blank the ones in line 1 of the diagram. A) much older B) much younger than C) slightly older than D) slightly younger thanarrow_forwardWhen a radio-isotope in a fossil with a half-life of 4,000 years has been reduced to 25% of its original amount, how old is the fossil?arrow_forwardList 5 examples of types of fossils.arrow_forward
- How do we know the age of a fossil?arrow_forwardScientists find an artifact next to an index fossil. What can they conclude about the unknown age of the artifact? a The artifact is older than the index fossil. b The artifact is younger than the index fossil. c The artifact is approximately the same age as the index fossil. d The artifact's age is not related to that of the index fossil.arrow_forwardIn which type of rock are you most likely to find a fossil? a. basalt, a dark, fine-grained volcanic rock b. limestone, composed of sedimented calcium carbonate c. slate, a volcanically melted and cooled shale d. granite, which forms by crystallization of magma cooling below Earth’s surfacearrow_forward
- Organism A lived from 410 to 60 million years ago. Organism B lived from 200 to 100 million years ago. Which organism will be the better index fossil? (1)arrow_forwardIn your own words, differetiate fossils and trace Fossils.arrow_forwardThe researchers found that the Neanderthal fossil had approximately0.0078 as much 14C as found originally in the atmosphere. (a) Usingthe numbers on your graph, determine how many half-lives havepassed since the Neanderthal died. (b) Using your 14C calibration onthe x-axis, what is the approximate age of the Neanderthal fossil inyears (round off to the nearest thousand)? (c) Approximately whendid Neanderthals become extinct according to this study? (d) Theresearchers cite evidence that modern humans (H. sapiens) becameestablished in the same region as the last Neanderthals approximately 39,000–42,000 years ago. What does this suggest aboutthe overlap of Neanderthals and modern humans?arrow_forward
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Fossil: The Language & History of Paleontology; Author: Alliterative;https://www.youtube.com/watch?v=x9yNwRBlKtU;License: Standard youtube license