ESSENTIAL COSMIC PERS.-W/MASTER.ACCESS
9th Edition
ISBN: 9780135795750
Author: Bennett
Publisher: PEARSON
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Chapter 9, Problem 42EAP
Rise of the Mammals. Suppose the impact 65 million years ago had not occurred. How do you think our planet would be different? For example, do you think that mammals still would eventually have come to dominate Earth? Would we be here? Defend your opinions.
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Which of the following is least reasonable regarding the concept of a habitable zone?
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Chapter 9 Solutions
ESSENTIAL COSMIC PERS.-W/MASTER.ACCESS
Ch. 9 - Prob. 1VSCCh. 9 - Prob. 2VSCCh. 9 - Prob. 3VSCCh. 9 - Prob. 4VSCCh. 9 - Prob. 5VSCCh. 9 - Briefly define asteroid, comet, dwarf planet,...Ch. 9 - Prob. 2EAPCh. 9 - Distinguish between primitive meteorites and...Ch. 9 - Prob. 4EAPCh. 9 - Prob. 5EAP
Ch. 9 - Prob. 6EAPCh. 9 - Prob. 7EAPCh. 9 - Describe the Kuiper belt and Oorl cloud in terms...Ch. 9 - Prob. 9EAPCh. 9 - Prob. 10EAPCh. 9 - Prob. 11EAPCh. 9 - Prob. 12EAPCh. 9 - Prob. 13EAPCh. 9 - Prob. 14EAPCh. 9 - Prob. 15EAPCh. 9 - Studies of a large object in the Kuiper belt...Ch. 9 - Prob. 17EAPCh. 9 - Prob. 18EAPCh. 9 - 19. Geologists discover a crater from a...Ch. 9 - Prob. 20EAPCh. 9 - In another solar system, astror1omers discover an...Ch. 9 - Prob. 22EAPCh. 9 - Prob. 23EAPCh. 9 - Prob. 24EAPCh. 9 - Prob. 25EAPCh. 9 - Prob. 26EAPCh. 9 - Prob. 27EAPCh. 9 - Prob. 28EAPCh. 9 - Prob. 29EAPCh. 9 - Prob. 30EAPCh. 9 - Prob. 31EAPCh. 9 - Prob. 32EAPCh. 9 - Prob. 34EAPCh. 9 - Prob. 35EAPCh. 9 - The Role of Jupiter. Suppose that Jupiter had...Ch. 9 - Prob. 38EAPCh. 9 - Prob. 39EAPCh. 9 - Prob. 40EAPCh. 9 - Prob. 41EAPCh. 9 - Rise of the Mammals. Suppose the impact 65 million...Ch. 9 - Asteroid and Comet Missions. Learn about a current...Ch. 9 - Impact Hazards. Many groups are searching for...Ch. 9 - Beneficial Asteroids. Learn about one of several...Ch. 9 - Prob. 46EAPCh. 9 - Adding Up Asteroids. It's estimated that there are...Ch. 9 - Prob. 48EAPCh. 9 - Prob. 49EAPCh. 9 - Room to Roam. It's estimated that there are a...Ch. 9 - 46. Comet Dust Accumulat ion. A few hundred tons...
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- Briefly summarize the evidence linking human activity to global warming. What are its potential consequences?arrow_forwardHow is a habitable zone likely to change over time? a. get narrower b. move further from the star c. they aren't likely to changearrow_forwardOut of the inner planets in the solar system (Mercury, Venus and Mar) which do you think is the most likely to be colonized? Explain why?arrow_forward
- Activity #1. Compare and Contrast. Similarities and differences of Venus, Earth and Mars. Do this on a separate sheet of paper. 1. Compare and contrast the three (3) terrestrial planets using table 1. 2. Provide explanations for your observations using table 2. 3. Answer the following guide questions. Guide questions: 1. Does planet size affect gravity? 2. Why do you think Venus has the highest mean temperature among the three planets? 3. Is presence of water a primary factor for a planet to sustain life? Why or why not? 4. Based on your observations using table 2, what are the notable features that makes the earth the only habitable planet among the three terrestrial planets? 5. What conclusions can you make?arrow_forwardImpact Energy. Consider a comet about 2 kilometers across with a mass of 4 × 1012 kg. Assume that it crashes into Earth at a speed of 30,000 meters per second (about 67,000 miles per hour). a. What is the total energy of the impact, in joules? (Hint: The kinetic energy formula tells us that the impact energy in joules will be 1 × m × v2, where 2 m is the comet’s mass in kilograms and v is its speed in meters per second.) b. A 1-megaton nuclear explosion releases about 4 × 1015 joules of energy. How many such nuclear bombs would it take to release as much energy as the comet impact? c. Based on your answers, comment on the degree of devastation the comet might cause.arrow_forwardIf you represent Earths history by a line that is 1 m long, how long a segment would represent the 400 million years since life first moved onto the land? How long a segment would represent the 4-millionyear history of humanoid life?arrow_forward
- How can a planet’s atmosphere affect the width of the habitable zone in its planetary system?arrow_forwardIf you detected radio signals with an average wavelength of 20.000 cm and suspected that they came from a civilization on a distant Earth-like exoplanet, roughly how much of a change in wavelength should you expect to detect as a result of the orbital motion of the distant exoplanet? (Hint: Use the Doppler shift formula, Eq. 7-3.) (Note: Earths orbital velocity is 30 km/s.)arrow_forwardThe runaway greenhouse effect and its inverse, the runaway refrigerator effect, have led to harsh, uninhabitable conditions on Venus and Mars. Does the greenhouse effect always cause climate changes leading to loss of water and life? Give a reason for your answer.arrow_forward
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