Life in the Universe, Books a la Carte Plus Mastering Astronomy with Pearson eText -- Access Card Package (4th Edition)
4th Edition
ISBN: 9780134394411
Author: Bennett
Publisher: PEARSON
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Chapter 4, Problem 30TYU
To determine
Identify the statement “Science can never determine with confidence the times or sequence of events that occurred millions or billions of years ago” as true or false.
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a parent isotope has a half-life of 500,000 years. if a rock contained 10mg of the parent isotope when it formed, how much parent isotope would be left after 1.5 million years?
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Given that the half-life of carbon-14 is 5,730 years. Consider a sample of fossilized wood that when alive, would have contained 24 gm of carbon-14. It now contains 1.5 gm of carbon-14. How old is the sample?
Chapter 4 Solutions
Life in the Universe, Books a la Carte Plus Mastering Astronomy with Pearson eText -- Access Card Package (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...
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- The evidence is overwhelming that the Grand Canyon was dug over a span of millions of years by the erosive power of the Colorado River and that river's tributary streams. Does this evidence support a catastrophic theory or an evolutionary theory?arrow_forwardWhy is there so little evidence of Earth’s earliest history and therefore the period when life first began on our planet?arrow_forwardWhat is epoch?arrow_forward
- A radioactive isotope has a half-life of 1.2 billion years. As measured by the presence of the isotope and its stable decay product, a rock originally contained 10 grams of the radioactive isotope, and now contains 1.25 grams. Approximately how many years old is the rock?arrow_forwardOne of the fossilized remains of the Taong Tabon you found contains 153 grams of Carbon-14 at time t = 0. If the half-life of Carbon-14 is 5 730 years, how much Carbon-14 remains after 500 years?arrow_forwardIf the half-life of a radioactive specimen is 100 years, then how long will it take for the specimen to reach 25% of its original amount? (24.3) (a) 25 years (b) 50 years (c) 100 years (d) 200 yearsarrow_forward
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