Life in the Universe (4th Edition)
4th Edition
ISBN: 9780134089089
Author: Jeffrey O. Bennett, Seth Shostak
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 4, Problem 54IF
Carbon-14 Dating. The half-life of carbon-14 is about 5700 years.
- a. You find a piece of cloth painted with organic dyes. By analyzing the dye in the cloth, you find that only 77% of the carbon-14 originally in the dye remains. When was the cloth painted?
- b. A well-preserved piece of wood found at an archaeological site has 6.2% of the carbon-14 that it must have had when it was living. Estimate when the wood was cut.
- c. Suppose a fossil is 570,000 years old, which is 100 half-lives of carbon-14. What fraction of its original carbon-14 would remain? Use your answer to explain why carbon-14 generally is not useful for dating fossils of this age.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Source A has a half-life of 10 million years, and source B has a half-life of 5 million years. After 10 million years, what percent of each source remains?
A. 50% of source A and 25% of source B
B. 50% of source A and 0% of source B
C. 25% of source A and 25% of source B
D. 25% of source A and 0% of source B
Uranium-238 (U-238) has a half-life of 4.5 billion years. Geologists find a rock containing a mixture of U-238 and lead, and determine that 82% of the original U-238 remains; the other 18% has decayed into lead. How old is the rock?
a.) The rock is _______ billion years old.
37. A sample of 4 g of cobalt isotope is produced. If the half-life of is 30 years, what will be the mass of
the cobalt remaining after 90 years? Please show all work (ref: p.808-813)
hulu
video
F2
F3
F4
FS
F6
F7
F8
FS
&
5
8.
R
Y
(O
图
图
LO
T
LL
Chapter 4 Solutions
Life in the Universe (4th Edition)
Ch. 4 - Briefly describe three aspects of geology that are...Ch. 4 - What do we mean by the geological record? Why is...Ch. 4 - Describe the three basic types of rock and the...Ch. 4 - How are sedimentary strata made, and how do they...Ch. 4 - Describe the technique of radiometric dating, and...Ch. 4 - How do fossils form? Do most living organisms...Ch. 4 - Summarize the geological time scale. What are...Ch. 4 - Prob. 8RQCh. 4 - Briefly describe how outgassing led to the origin...Ch. 4 - What was the heavy bombardment, and what effect...
Ch. 4 - Briefly describe Earths core-mantle-crust...Ch. 4 - Briefly describe the conveyorlike action of plate...Ch. 4 - Describe how plate tectonics shapes important...Ch. 4 - What evidence do we have for the operation of...Ch. 4 - What are the three requirements for a planetary...Ch. 4 - Briefly describe the mechanism by which the...Ch. 4 - What has happened to most of the carbon dioxide...Ch. 4 - What are ice ages, and what may cause them? What...Ch. 4 - Briefly summarize the key ways in which geology is...Ch. 4 - How do we think the Moon formed, and what evidence...Ch. 4 - We can expect that if there are paleontologists a...Ch. 4 - Nearly all the rocks I found in the lava fields of...Ch. 4 - Prob. 23TYUCh. 4 - Although Earth contains its densest material in...Ch. 4 - If you had a time machine that dropped you off on...Ch. 4 - If there were no plate tectonics on Earth, our...Ch. 4 - Without the greenhouse effect, there probably...Ch. 4 - If nitrogen were a greenhouse gas, our planet...Ch. 4 - We can learn a lot about Earths early history by...Ch. 4 - Prob. 30TYUCh. 4 - A rocks type (igneous, metamorphic, or...Ch. 4 - To learn a rocks age, we must (a) determine its...Ch. 4 - Radiometric dating now allows us to determine...Ch. 4 - Earths oceans formed (a) during the late stages of...Ch. 4 - We learn about the heavy bombardment by studying...Ch. 4 - Earth has retained a lot of internal heat...Ch. 4 - Plate tectonics is best described as a process...Ch. 4 - Earth has far less atmospheric carbon dioxide than...Ch. 4 - If Earth had more greenhouse gases in its...Ch. 4 - Snowball Earth refers to (a) one of a series of...Ch. 4 - The Age of Earth. Some people still question...Ch. 4 - Dating Planetary Surfaces. We have discussed two...Ch. 4 - Earth Without Differentiation. Suppose Earth had...Ch. 4 - Earth Without Plate Tectonics. Suppose plate...Ch. 4 - Feedback Processes in the Atmosphere. As the Sun...Ch. 4 - Geological Time. Geological time scales are often...Ch. 4 - Dating Lunar Rocks. You are analyzing Moon rocks...Ch. 4 - Carbon-14 Dating. The half-life of carbon-14 is...Ch. 4 - Martian Meteorite. Some unusual meteorites thought...Ch. 4 - Internal vs. External Heating. In daylight, Earths...Ch. 4 - Plate Tectonics. Typical motions of one plate...Ch. 4 - More Plate Tectonics. Consider a seafloor...Ch. 4 - Plate Tectonics and Us. Based on what you learned...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- 7A. What method do scientists use to determine the age of fossils, and what radioactive isotope do scientists use to determine the age of organic fossils? Your answer wwwwwwarrow_forwardWhy are some radioactive substances dangerous for a very long time? Select one: a. Some radioactive substances have very long half-lives. It takes a long time for the number of radioactive atoms to decrease. b. Some radioactive atoms combine easily with minerals in the ground, so they can't be removed from the environment. c. Some radioactive atoms combine easily with organic molecules. They get into the food chain where they can't be removed. d. Some radioactive molecules are very light, so they stay in the air for long periods of time.arrow_forwardA fossil is found that contains 6.25% as much Radium-226 as fossils being formed today. The half-life of Radium -226 is 1.60 x103 years. How old is the fossil? Hint: How many half-lives did the Radium-226 go through for 6.25% to remain? So, how many years have passed over 4 half lives?arrow_forward
- 1. Calculate the age of the fossil given that the amount of 14C found in it is 92 percent of that in living tissue. Carbon-14 has a half life of 5730 years ?arrow_forwardExplain how "carbon dating" is used to establish the age of once living things.arrow_forward8. The half-life of certain type of carbon used for carbon-dating is 5730 years. Determine the age of a bone if it now contains 38 percent of the original amount of carbon. A = 4,(0.5)*arrow_forward
- DATE NAME Half-life Practice 1. What is half-life? 2. If we start with 400 atoms of a radioactive substance, how many would we have after: a. one half-life? b. two half-lives? c. three half-lives? d. four half-lives? 3. If we start with 48 atoms of a radioactive substance, how many would remain after: a. one half-life? b. two half-lives? c. after three half-lives? d. after four half-lives? Using the graph to the right, answer the following questions. 4. What is the half-life of each element? 5. Which element has the shortest half-life? 10- 6. Which element is the most unstable? How do you know? Ago 10 years ) Use the graph on the to answer the following questions. 7. How many atoms are in the original sample size of this radioisotope? 8. How long is the half-life? 9. How many atoms are left after 2 half-lives? 10. Approximately how many days would have to pass for there to be only 2.5 atoms of the sample remaining? How many half-lives? Parcent ot Oniginal Mase Romainingarrow_forward1. The half-life of cobalt-60 is 5.3 years. If 4.0g of cobalt-60 are allowed to decay for 21.2 years. a. How many grams of cobalt-60 are radioactive? b. How many grams are decayed? c. How many years have gone by if 63/64 of the sample decayed? d. How many grams of the 4.0g sample are radioactive if 63/64 decayed?arrow_forwardWhat 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 fossilsarrow_forward
- 5. If a 10-gram sample of a radioactive substance has a half-life of 6000 years, how much would be present after 8000 years? 6. If Nitrogen-14 absorbs an alpha particle and then emits a Hydrogen-1, what is the resulting nucleus?arrow_forward1. What is the significance of the slope from the second graph of the natural logarithm vs time? 2. From N = Noe-t, show, using algebra that the half-life T 0.693 3. A source containing 10 microcuries of radioactive cobalt (60CO) is stored away. What percentage of the cobalt will disintegrate in one year? The half life of radioactive cobalt is 5.27 years.arrow_forwardCan you help solve this?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Horizons: Exploring the Universe (MindTap Course ...PhysicsISBN:9781305960961Author:Michael A. Seeds, Dana BackmanPublisher:Cengage Learning
An Introduction to Physical SciencePhysicsISBN:9781305079137Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar TorresPublisher:Cengage Learning
Horizons: Exploring the Universe (MindTap Course ...
Physics
ISBN:9781305960961
Author:Michael A. Seeds, Dana Backman
Publisher:Cengage Learning
An Introduction to Physical Science
Physics
ISBN:9781305079137
Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres
Publisher:Cengage Learning
A Level Physics – Ideal Gas Equation; Author: Atomi;https://www.youtube.com/watch?v=k0EFrmah7h0;License: Standard YouTube License, CC-BY