Astronomy
1st Edition
ISBN: 9781938168284
Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher: OpenStax
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Textbook Question
Chapter 14, Problem 4E
What do we mean by primitive material? How can we tell if a meteorite is primitive?
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Chapter 14 Solutions
Astronomy
Ch. 14 - A friend of yours who has not taken astronomy sees...Ch. 14 - In what ways are meteorites different from...Ch. 14 - How are comets related to meteor showers?Ch. 14 - What do we mean by primitive material? How can we...Ch. 14 - Describe the solar nebula, and outline the...Ch. 14 - Why do the giant planets and their moons have...Ch. 14 - How do the planets discovered so far around other...Ch. 14 - Explain the role of impacts in planetary...Ch. 14 - Why are some planets and moons more geologically...Ch. 14 - Summarize the origin and evolution of the...
Ch. 14 - Why do meteors in a meteor shower appear to come...Ch. 14 - What methods do scientists use to distinguish a...Ch. 14 - Why do iron meteorites represent a much higher...Ch. 14 - Why is it more useful to classify meteorites...Ch. 14 - Which meteorites are the most useful for defining...Ch. 14 - Suppose a new primitive meteorite is discovered...Ch. 14 - How do we know when the solar system formed?...Ch. 14 - We have seen how Mars can support greater...Ch. 14 - Present theory suggests that giant planets cannot...Ch. 14 - Why are meteorites of primitive material...Ch. 14 - How long would material take to go around if the...Ch. 14 - Consider the differentiated meteorites. We think...Ch. 14 - Estimate the maximum height of the mountains on a...
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- Explain how high-speed impacts form circular craters. How can this explanation account for the various characteristic features of impact craters?arrow_forwardIn what ways are meteorites different from meteors? What is the probable origin of each?arrow_forwardWhy do astronomers conclude that the surface of Mercury, shown in Figure UN 15-4, is old? When did the majority of those craters form?arrow_forward
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- Which meteorites are the most useful for defining the age of the solar system? Why?arrow_forwardConsider the differentiated meteorites. We think the irons are from the cores, the stony-irons are from the interfaces between mantles and cores, and the stones are from the mantles of their differentiated parent bodies. If these parent bodies were like Earth, what fraction of the meteorites would you expect to consist of irons, stony-irons, and stones? Is this consistent with the observed numbers of each? (Hint: You will need to look up what percent of the volume of Earth is taken up by its core, mantle, and crust.)arrow_forwardGanymede and Callisto were the first icy objects to be studied from a geological point of view. Summarize the main differences between their geology and that of the rocky terrestrial planets.arrow_forward
- How do the risks of dying from the impact of an asteroid or comet compare with other risks we are concerned about, such as dying in a car accident or from heart disease or some other natural cause? (Hint: To find the annual risk, go to the library or internet and look up the annual number of deaths from a particular cause in a particular country, and then divide by the population of that country.)arrow_forwardIf a single asteroid 1 km in diameter were to be fragmented into meteoroids 1 m in diameter, how many would it yield? (Hint: The volume of a sphere 43r3 )arrow_forwardWhich step(s) listed in the previous question can be eliminated in models that form Jovian planets in thousands of years, a time frame that solves the Jovian problem? Order the following steps in the formation of a Terrestrial planet chronologically: gravitational collapse, accretion, outgassing, condensation, and differentiation.arrow_forward
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