BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 43, Problem 1CT
Summary Introduction
To discuss:
In what direction, the prevailing winds carry the isotopes when a tsunami damaged a nuclear power plant in Fukushima, Japan on March 2011.
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Suppose a scientist finds a rock with an interesting fossil. Curious to know the age of the fossil, she takes the rock to a lab. The
lab determines the amount of rubidium (Rb) and strontium (Sr) in the rock. The scientist is familiar with radiometric dating and
knows that she can now calculate the age of the rock, 1, using an isochron. The Rb-Sr isochron equation is
87.
Rb.
[edr – 1]
86
°Sr.
87
87
Sro
86
Sro
86
Sr.
87.
Rb
3.807 and
89.60. In a published table, she finds that
Using the lab's values, she calculates the isotope ratios as
86
Sr.
87
= 0.7129. She also finds that the decay constant,
86
the ratio of strontium-87 to strontium-86 at the formation of the rock was
Sro
2, for rubidium-87 is 1.42 x 10-11.
Use the equation and provided data to calculate t. Put your answer in scientific notation and round to the nearest tenth.
years
x10
What is the approximate age of the rock in billions of years? Round to the nearest tenth.
billions of years
t =
Why is the biological half-life of a radioisotope shorter thanits physical half-life?
A rock sample which originally contained 400 grams of radioactive isotope X now contains 25 grams of the
material. The half-life of isotope X is 10,000 years. How old is the rock sample? (Give your answer
without any punctuation or lables. For example: 15000).
Chapter 43 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Ch. 43 - Prob. 1SACh. 43 - Which latitude will have the most hours of...Ch. 43 - Prob. 3SACh. 43 - Prob. 4SACh. 43 - Prob. 5SACh. 43 - ____________ have a deep layer of humus-rich...Ch. 43 - Prob. 7SACh. 43 - Prob. 8SACh. 43 - Prob. 9SACh. 43 - Prob. 10SA
Ch. 43 - Chemoautotrophic bacteria and archaea are the...Ch. 43 - Prob. 12SACh. 43 - Prob. 13SACh. 43 - Unrelated species living in geographically...Ch. 43 - Prob. 15SACh. 43 - Prob. 1CTCh. 43 - Owners of off-road recreational vehicles would...Ch. 43 - Prob. 3CTCh. 43 - London, England, is at the same latitude as...Ch. 43 - Prob. 5CT
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which parent isotope is most useful for dating samples that are greater than 100 million years old? a potassium-40 b lead-206 c argon-40 d uranium-238arrow_forwardIn stratosphere, which elements acts as a catalyst in degradation of ozone and release of molecular oxygen?arrow_forwardAt a time before life existed on Earth, our planet's atmosphere contained extremely little or no Question 2 options: a) nitrogen gases b) water vapor c) carbon dioxide d) gaseous oxygen e) noxious gasesarrow_forward
- What are stromatolites? From what we know of their formation today, why might we expect them to have been present early in Earth’s history?arrow_forwardCh. 16-2 Radiometric dating does not measure the age of an individual atom. It is a measure of the age of a quantity of atoms—a statistic. As with any statistical measure, its values may deviate around an average. Imagine that one sample of rock is dated ten different ways. Nine of the tests yield an age close to 225,000 years. One test yields an age of 3.2 million years. Do the nine consistent results imply that the one that deviates is incorrect, or does the one odd result invalidate the nine that are consistent?arrow_forwardAssume a flat Friedmann-Robertson-Walker universe.Calculate the redshift z at which the temperature of the CMB was T = 10 T0, where T0 is thetemperature of the CMB today. Assuming the universe was matter dominated throughout itsevolution, calculate the time at which T = 10 T0 in Gigayears.arrow_forward
- What are radioisotopes?arrow_forwardWe are relatively "new" to the Earth yet how come our impact to the Earth System has been profound?arrow_forwardThe most useful method for dating ancient calcium rich cave deposits would be Group of answer choices A: Argon-Argon Dating B: Paleomagnetic Reversals C: Electron Spin Resonance Dating D: Uranium-Thorium Dating E: Potassium-Argon Datingarrow_forward
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