The Cosmic Perspective
7th Edition
ISBN: 9780321839558
Author: Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider, Mark Voit
Publisher: Addison-Wesley
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Textbook Question
Chapter 8, Problem 34EAP
Choose the best answer to each of the following. Explain your reasoning with one or more complete sentences.
34. About how old is the solar system? (a) 4.5 million years (b) 4.5 billion years (c) 4.5 trillion years
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We think the terrestrial planets formed around solid “seeds” that later grew over time through the accretion of rocks and metals.
a) Suppose the Earth grew to its present size in 1 million years through the accretion of particles averaging 100 grams each. On average, how many particles did the Earth capture per second, given that the mass of the Earth is = 5.972 × 10 ^24 kg ?
b) If you stood on Earth during its formation and watched a region covering 100 m^2, how many impacts would you expect to see in one hour. Use the impact rate you calculated in part a. You’ll need the following as well: the radius of the Earth is = 6.371 × 10 ^6 m and the surface area of the Earth is 4??^2Earth
1) How massive would Earth had been if it had accreted hydrogen compounds in addition to the sme properties listed in table 7.1? (Assume the same properties of the ingredients as listed in the table)
2) Now imagine that Earth had been able to capture hydrogen and helium gas in the same proportions as listed in the table. How massive would it have been?
How is a habitable zone likely to change over time?
a. get narrower
b. move further from the star
c. they aren't likely to change
Chapter 8 Solutions
The Cosmic Perspective
Ch. 8 - Prob. 1VSCCh. 8 - Prob. 2VSCCh. 8 - Prob. 3VSCCh. 8 -
Briefly describe the four major features of our...Ch. 8 - What is the nebular theory, and why is it widely...Ch. 8 - What do we mean by the solar nebula? What was it...Ch. 8 -
4. Describe the three key processes that led the...Ch. 8 - List the approximate condensation temperature and...Ch. 8 - What was the frost line? Which ingredients...Ch. 8 - Briefly describe the process by which terrestrial...
Ch. 8 - How was the formation of jovian planets similar to...Ch. 8 - What is the solar wind, and what roles did it play...Ch. 8 - How did planet formation lead to the existence of...Ch. 8 - What was the heavy bombardment, and when did it...Ch. 8 - What is the leading hypothesis for the Moon’s...Ch. 8 - Prob. 13EAPCh. 8 - How old is the solar system, and how do we know?Ch. 8 - Surprising Discoveries? Suppose we found a solar...Ch. 8 - Prob. 16EAPCh. 8 - Surprising Discoveries? Suppose we found a solar...Ch. 8 - Prob. 18EAPCh. 8 - Prob. 19EAPCh. 8 - Prob. 20EAPCh. 8 - Prob. 21EAPCh. 8 - Prob. 22EAPCh. 8 - Prob. 23EAPCh. 8 - Prob. 24EAPCh. 8 - Choose the best answer to each of the following....Ch. 8 - Choose the best answer to each of the following....Ch. 8 - Choose the best answer to each of the following....Ch. 8 - Prob. 28EAPCh. 8 - Choose the best answer to each of the following....Ch. 8 - Choose the best answer to each of the following....Ch. 8 - Prob. 31EAPCh. 8 - Choose the best answer to each of the following....Ch. 8 - Choose the best answer to each of the following....Ch. 8 - Choose the best answer to each of the following....Ch. 8 - Explaining the Past. Is it really possible for...Ch. 8 - Prob. 36EAPCh. 8 - A Cold Solar Nebula. Roles: Scribe (take notes on...Ch. 8 - Prob. 38EAPCh. 8 - Prob. 39EAPCh. 8 - Prob. 40EAPCh. 8 - Prob. 41EAPCh. 8 - Prob. 42EAPCh. 8 - Prob. 43EAPCh. 8 - Prob. 44EAPCh. 8 - Prob. 45EAPCh. 8 - Prob. 46EAPCh. 8 - Prob. 47EAPCh. 8 - Prob. 48EAPCh. 8 - Prob. 49EAPCh. 8 - Be sure to show all calculations clearly and state...Ch. 8 - Prob. 51EAPCh. 8 - Prob. 52EAPCh. 8 - Lucky to Be Here? Considering the overall process...Ch. 8 - Prob. 54EAPCh. 8 - Prob. 55EAPCh. 8 - Prob. 56EAP
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