Life in the Universe (4th Edition)
4th Edition
ISBN: 9780134089089
Author: Jeffrey O. Bennett, Seth Shostak
Publisher: PEARSON
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Textbook Question
Chapter 10, Problem 29TYU
The habitable zone refers to (a) the regions of a planet where good weather allows life to exist; (b) the range of distances from a star where a planet’s surface temperature is always above the freezing point of water; (c) the range of distances from a star within which water could exist in liquid form on a suitably sized planet.
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Chapter 10 Solutions
Life in the Universe (4th Edition)
Ch. 10 - What is a habitable zone, and how is the idea...Ch. 10 - Describe several ways in which it may be possible...Ch. 10 - Why do we think that Venus should have outgassed...Ch. 10 - How much water is present on Venus today? How do...Ch. 10 - What is a runaway greenhouse effect, and why did...Ch. 10 - Could Venus ever have had oceans and, if so, could...Ch. 10 - How do we expect the habitable zones of brighter...Ch. 10 - Why is planetary size important to habitability?...Ch. 10 - What factors besides size and distance from the...Ch. 10 - What factors affect the location of the inner...
Ch. 10 - What factors affect the location of the outer...Ch. 10 - Why does the Sun gradually brighten, and how does...Ch. 10 - How and when will Earth become uninhabitable? Why?...Ch. 10 - Briefly describe the eventual fates of the Sun and...Ch. 10 - How do we determine global average temperatures...Ch. 10 - What do ice core data tell us about the past...Ch. 10 - What is the role of climate modeling in...Ch. 10 - Describe several potential consequences of global...Ch. 10 - Decide whether each statement makes sense or does...Ch. 10 - Decide whether each statement makes sense or does...Ch. 10 - Venus is not in the habitable zone now, but a few...Ch. 10 - Decide whether each statement makes sense or does...Ch. 10 - Decide whether each statement makes sense or does...Ch. 10 - Prob. 24TYUCh. 10 - Decide whether each statement makes sense or does...Ch. 10 - Prob. 26TYUCh. 10 - Decide whether each statement makes sense or does...Ch. 10 - Prob. 28TYUCh. 10 - The habitable zone refers to (a) the regions of a...Ch. 10 - A planet that is not within a habitable zone...Ch. 10 - Choose the best answer to each of the following....Ch. 10 - Choose the best answer to each of the following....Ch. 10 - Choose the best answer to each of the following....Ch. 10 - Choose the best answer to each of the following....Ch. 10 - Choose the best answer to each of the following....Ch. 10 - Prob. 36TYUCh. 10 - Prob. 37TYUCh. 10 - Choose the best answer to each of the following....Ch. 10 - Science with Consequences. A small but vocal group...Ch. 10 - The Habitable Zone. Considering the possibility...Ch. 10 - Are Habitable Zone Planets Common? Based on what...Ch. 10 - No Plate Tectonics. Suppose plate tectonics...Ch. 10 - Continuously Habitable Zone. Is Earth in a zone...Ch. 10 - Planetary Changes. Write two or three paragraphs...Ch. 10 - Venuss History. Many people are not surprised to...Ch. 10 - Habitable Moons. As well discuss in Chapter 11,...Ch. 10 - Greenhouse Lessons. While it seems unlikely that...Ch. 10 - Global Warming. Briefly summarize the evidence...Ch. 10 - Massive Stellar Habitable Zone. Consider a star...Ch. 10 - Strength of Sunlight at Venus and Mars. The solar...Ch. 10 - Atmospheric Mass of Venus. The atmospheric...Ch. 10 - Prob. 58IFCh. 10 - The Politics of Global Warming. The current...Ch. 10 - Dealing with Uncertainty. One of the difficulties...
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- Tutorial 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_forwardTutorial 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_forwardWhich of the following is least reasonable regarding the concept of a habitable zone? Group of answer choices M-type stars have wider habitable zones than G-type stars. It is a region around a star where liquid water could be found on a planet's surface. The habitable zone of a less massive star would be closer to the star. In the course of millions of years, our habitable zone will slowly shift from Earth to Mars. The Galactic habitable zone cannot be too close to the Galactic center because the radiation from the bright stars and supernovae in the crowded inner part of the Galaxy would probably be detrimental to life.arrow_forward
- How can a planet’s atmosphere affect the width of the habitable zone in its planetary system?arrow_forwardWhat are the three requirements that scientists believe an environment needs to supply life with in order to be considered habitable?arrow_forwardLife on Earth exists because of oxygen in Earths atmosphere. True false? Explain your answer.arrow_forward
- If 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_forwardMolecules of which gas were needed in Earths atmosphere for life to evolve from living in the sea to living on the land? Why?arrow_forwardA newly discovered orange dwarf star has a surface temperature of approximately 5185 K. How far would its Goldilocks Zone be from the star if an astrologist wanted to look for potentially habitable planets? And how wide would the zone be?arrow_forward
- Today, the largest radio telescope in the world is located in Puerto Rico Russia China Australia To be considered habitable, a planet must have an alien civilization living on it the right temperature for liquid water on the surface the right conditions for human explorers to be able to survive a very large iron corearrow_forwardWhen Mars is 90 million km from Earth, a) How long would it take for a radio wave from a video camera mounted on the back of a Mars Rover to tell ground control on earth that the Rover is about to go over a cliff? b) How long would it take for a radio signal from Earth to reach the Rover saying "STOP". c) Why do our Mars Rovers have to be "intelligent" enough to figure out how to deal with obstacles themselves?arrow_forwardImagine that we discovered a new planet that has the potential to support life. This planet has plenty of water on its surface and carbon dioxide in its atmosphere, and a nice, comfortable temperature similar to Earth. The only difference is that this planet orbits a star that produces green light only. If we took some plants from Earth and planted them on this new planet, would our plants be able to grow? Explain your answer.arrow_forward
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