ESSENTIAL COSMIC PERS.-W/MASTER.ACCESS
9th Edition
ISBN: 9780135795750
Author: Bennett
Publisher: PEARSON
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Chapter 7, Problem 46EAP
Miniature Mars. Suppose Mars had turned out to be significantly smaller than its current size—say, the size of our Moon, How would this have affected the number of geological features due to each of the four major geological processes? Do you think Mars would still be a good candidate for harboring extraterrestrial life? Summarize your answers in two or three paragraphs.
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Students have asked these similar questions
The principle cause of our intense interest in Mars in the decades before the dawn of the space age was that
Answers:
A.
a few astronomers believed that they saw evidence of an intelligent civilization on Mars.
B.
Mars has seasons just like the Earth and therefore should be inhabitable by humans.
C.
Mars has an unusual surface color and global dust storms, creating strange weather patterns.
D.
Mars has unusual orbital properties making our understanding of its motion around the Sun very difficult.
CO2 and planetary warming: understanding Earth’s complicated atmosphere Mars has an atmospheric pressure of 6 mbar (compared with Earth atmosphere pressure of 1013 mbar), 96% of which is CO2. The average calculated temperature of Mars is -57°C, whereas the actual average temperature is -55°C so that the amount of warming due to CO2 is only 2°C. On the other hand, the average calculated temperature of Earth, with 0.4 mbar of CO2, is -19°C, whereas the actual average temperature is 15°C so that the amount of warming due to CO2 is 34°C, much greater than that on Mars, which has higher CO2 concentration. Explain how this is possible.
Fully describe the greenhouse effect. How is this important for life on earth?
Chapter 7 Solutions
ESSENTIAL COSMIC PERS.-W/MASTER.ACCESS
Ch. 7 - Prob. 1VSCCh. 7 - Prob. 2VSCCh. 7 - Prob. 3VSCCh. 7 - Prob. 4VSCCh. 7 - Prob. 1EAPCh. 7 - Prob. 2EAPCh. 7 - Prob. 3EAPCh. 7 - Prob. 4EAPCh. 7 - Prob. 5EAPCh. 7 - Prob. 6EAP
Ch. 7 - Prob. 7EAPCh. 7 - Prob. 8EAPCh. 7 - Prob. 9EAPCh. 7 - Prob. 10EAPCh. 7 - Prob. 11EAPCh. 7 - Prob. 12EAPCh. 7 - Prob. 13EAPCh. 7 - Prob. 14EAPCh. 7 - Prob. 15EAPCh. 7 - What is the carbon dioxide cycle, and why is it so...Ch. 7 - Prob. 17EAPCh. 7 - Based on Figure 7.51, summarize the roles of...Ch. 7 - Prob. 19EAPCh. 7 - Prob. 20EAPCh. 7 - Prob. 21EAPCh. 7 - A new orbital photograph of Mars shows a crater...Ch. 7 - Clear-cutting in the Amazon rain forest on Earth...Ch. 7 - Drilling into the Martian surface, a robotic...Ch. 7 - Prob. 25EAPCh. 7 - Prob. 26EAPCh. 7 - Prob. 27EAPCh. 7 - Prob. 28EAPCh. 7 - Prob. 29EAPCh. 7 - Prob. 30EAPCh. 7 - Prob. 31EAPCh. 7 - Which describes our understanding of flowing water...Ch. 7 - Prob. 33EAPCh. 7 - Prob. 34EAPCh. 7 - Prob. 35EAPCh. 7 - Prob. 36EAPCh. 7 - Prob. 37EAPCh. 7 - Prob. 38EAPCh. 7 - Prob. 40EAPCh. 7 - Worth the Effort? Politicians often argue over...Ch. 7 - Skeptic Claims on Global Warming. A small, vocal...Ch. 7 - Unanswered Questions. Choose one important but...Ch. 7 - Miniature Mars. Suppose Mars had turned out to be...Ch. 7 - Two Paths Diverged. Briefly explain how the...Ch. 7 - Change in Formation Properties. Consider either...Ch. 7 - “Coolest” Surface Photo. Visit the Astronomy...Ch. 7 - Experiment: Planetary Cooling in a Freezer. Fill...Ch. 7 - Prob. 51EAPCh. 7 - Terraforming Mars. Some people have suggested that...Ch. 7 - Global Warming Op-Ed. What, if anything, do you...Ch. 7 - Prob. 54EAPCh. 7 - Prob. 55EAPCh. 7 - Prob. 56EAPCh. 7 - Prob. 57EAP
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- 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_forwardWhich of the following seems least reasonable regarding life on Earth? Group of answer choices There is much scientific evidence suggesting that all creatures living on Earth today appear to have evolved from a common ancestor. Louis Pasteur discredited the concept of spontaneous generation by demonstrating that even bacteria and other microorganisms arise from parents resembling themselves. There is ample physical evidence that the earliest life forms on Earth were multicellular creatures, perhaps resembling some of our primitive fish. When the earth formed some 4.6 billion years ago, it was a lifeless, inhospitable place. Before the mid-17th century, most people believed that God had created humankind and other higher organisms and that insects, frogs, and other small creatures could arise spontaneously in mud or decaying matter About billion years into its development, the Earth it was teeming with organisms resembling blue-green algae.arrow_forwardBriefly summarize the evidence linking human activity to global warming. What are its potential consequences?arrow_forward
- How does the habitable zone differ for a star hotter than the sun?arrow_forwardOut of the inner planets in the solar system (Mercury,Venus and Mars), Which do you think is most likely to be colonized? Explain why?arrow_forwardTutorial A radio broadcast left Earth in 1923. How far in light years has it traveled? If there is, on average, 1 star system per 400 cubic light years, how many star systems has this broadcast reached? Assume that the fraction of these star systems that have planets is 0.50 and that, in a given planetary system, the average number of planets that have orbited in the habitable zone for 4 billion years is 0.40. How many possible planets with life could have heard this signal? Part 1 of 3 To figure out how many light years a signal has traveled we need to know how long since the signal left Earth. If the signal left in 1923, distance in light years = time since broadcast left Earth. d = tnow - broadcast d = 97 97 light years Part 2 of 3 Since the radio signal travels in all directions, it expanded as a sphere with a radius equal to the distance it has traveled so far. To determine the number of star systems this signal has reached, we need to determine the volume of that sphere. V, = Vb…arrow_forward
- Tutorial A radio broadcast left Earth in 1925. How far in light years has it traveled? If there is, on average, 1 star system per 400 cubic light years, how many star systems has this broadcast reached? Assume that the fraction of these star systems that have planets is 0.30 and that, in a given planetary system, the average number of planets that have orbited in the habitable zone for 4 billion years is 0.85. How many possible planets with life could have heard this signal? Part 1 of 3 To figure out how many light years a signal has traveled we need to know how long since the signal left Earth. If the signal left in 1925, distance in light years = time since broadcast left Earth. d = tnow - tbroadcast d = light years Submit Skip (you cannot come back)arrow_forwardA radio broadcast left Earth in 1911. How far in light years has it traveled? If there is, on average, 1 star system per 400 cubic light years, how many star systems has this broadcast reached? Assume that the fraction of these star systems that have planets is 0.50 and that, in a given planetary system, the average number of planets that have orbited in the habitable zone for 4 billion years is 0.20. How many possible planets with life could have heard this signal?arrow_forwardDescribe the current atmosphere on Mars. What evidence suggests that it must have been different in the past?arrow_forward
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