EBK BIOLOGY:SCIENCE F/LIFE
6th Edition
ISBN: 9780134819167
Author: BELK
Publisher: PEARSON
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Chapter 11, Problem 2LTB
Summary Introduction
Introduction:
The determination of the date when an ancient organism lived can be estimated through the age of the rocks. Radiometric dating depends on radioactive decay, as the rocks spontaneously break down into different unique elements as daughter products.
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A scientist has a fossil that was found in a layer of rock close to Earth’s surface. He believes that the fossil is around 12,000 years old.
Which method would best allow the scientist to confirm the actual age of the fossil?
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finding another fossil in the same layer of rock
using carbon/nitrogen absolute dating
using potassium/argon absolute dating
Explain why it is difficult to use carbon-14 dating on 100-million-year-old dinosaur fossils
Use the graph to answer questions #7-8 on the fossils. I think number #9 is B
Chapter 11 Solutions
EBK BIOLOGY:SCIENCE F/LIFE
Ch. 11 - What observations did Darwin make on the Galapagos...Ch. 11 - Prob. 2LTBCh. 11 - Prob. 3LTBCh. 11 - In science, a theory is a(n) ___________. educated...Ch. 11 - The theory of common descent states that all modem...Ch. 11 - Prob. 6LTBCh. 11 - Prob. 7LTBCh. 11 - Even though marsupial mammals give birth to live...Ch. 11 - Prob. 9LTBCh. 11 - Which of the following taxonomic levels contains...
Ch. 11 - Prob. 1AAATBCh. 11 - DNA is not the only molecule that is used to test...Ch. 11 - Look at the tree you generated for question 2. It...Ch. 11 - Search for the biology learning standards...Ch. 11 - Humans and chimpanzees are more similar to each...Ch. 11 - The science that you learned in this chapter has...
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- True or false? Wrinkly textures in rock that formed from ancient biofilms living in marine sediments are considered trace fossils.arrow_forwardIn radiometric dating, scientists use the half-life of a radioactive isotope, to determine the approximate age of rocks, and the fossils that are embedded in them. Half-life is the time it takes for half of a radioactive element to become stable.Uranium 238 (238U) is a radioactive element that decays into Lead (206Pb) after 4.5 billion years. 6) Scientists found a fossil in a layer of rock that tested as 1/8th U and 7/8th Pb. What is the approximate age of the fossil? A) 562 million years old B) 4.5 billion years old C) 9 billion years old D) 13.5 billion years old Not Gradedarrow_forwardRadiometric dating measures the decay of radioactive isotopes present in layers where fossils are found. True Falsearrow_forward
- Give 1 reason from the reading that shows that there are no life forms on Venus.arrow_forwardRadiometric decay of carbon-14 would be used in dating sedimentary rock. a trace fossil. an insect in amber. a fossil imprint. igneous rock.arrow_forwardWhy is it so important to learn about the Piltdown Hoax? Do you think it demonstrates that scientists may lose their objectivity when they want data to fulfill their expectations and desires or does it demonstrate the self-corrective nature of science? Why were people so willing to believethat one of the oldest specimens was found in south England?arrow_forward
- Consider three important fossil SITES in Canada. Name them. Put them in order from the oldest to the youngest. For each site, provide one phrase that captures the significance of the site.arrow_forwardFact or theory? Organisms that look similar have been observed to have differences when preserved in rocks of different ages.arrow_forwardVolcanic ash can be used to date fossil finds because each time it is expelled by an eruption it has the same relative proportions of radioactive isotopes. True or Falsearrow_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_forwardWhich of the following events are possible sources of high levels of iridium in sediments? Write 'yes' or 'no' next to each of the four possibilities. There may be more than one 'yes' response. 4. An asteroid impact Rain Fossilized foraminifera A supernovaarrow_forwardWhich statement about spontaneous generation is false? A. It addresses the formation of living cells from previously nonliving material. B. This was a common belief for during the Middle Ages. C. Pasteur demonstrated that it does not occur under normal laboratory conditions. D. It occurs every time a new species evolves from a preexisting species. E. It apparently occurred at least once – when life on Earth began.arrow_forward
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