Astronomy
1st Edition
ISBN: 9781938168284
Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher: OpenStax
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Textbook Question
Chapter 10, Problem 20E
Is it likely that life ever existed on either Venus or Mars? Justify your answer in each case.
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Out of the inner planets in the solar system (Mercury,Venus and Mars), Which do you think is most likely to be colonized? Explain why?
Out 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?
List the evidence that suggests the past (and possibly present) existence of liquid water onthe surface of Mars
Chapter 10 Solutions
Astronomy
Ch. 10 - List several ways that Venus, Earth, and Mars are...Ch. 10 - Compare the current atmospheres of Earth, Venus,...Ch. 10 - How might Venus’ atmosphere have evolved to its...Ch. 10 - Describe the current atmosphere on Mars. What...Ch. 10 - Explain the runaway refrigerator effect and the...Ch. 10 - What evidence do we have that there was running...Ch. 10 - What evidence is there that Venus was volcanically...Ch. 10 - Why is Mars red?Ch. 10 - What is the composition of clouds on Mars?Ch. 10 - What is the composition of the polar caps on Mars?
Ch. 10 - Describe two anomalous features of the rotation of...Ch. 10 - How was the Mars Odyssey spacecraft able to detect...Ch. 10 - What are the advantages of using radar imaging...Ch. 10 - Venus and Earth are nearly the same size and...Ch. 10 - Why is there so much more carbon dioxide in the...Ch. 10 - If the Viking missions were such a rich source of...Ch. 10 - Compare Mars with Mercury and the Moon in terms of...Ch. 10 - Contrast the mountains on Mars and Venus with...Ch. 10 - We believe that all of the terrestrial planets had...Ch. 10 - Is it likely that life ever existed on either...Ch. 10 - Suppose that, decades from now, NASA is...Ch. 10 - We believe that Venus, Earth, and Mars all started...Ch. 10 - One source of information about Mars has been the...Ch. 10 - The runaway greenhouse effect and its inverse, the...Ch. 10 - In what way is the high surface temperature of...Ch. 10 - What is a dust devil? Would you expect to feel...Ch. 10 - Near the martian equator, temperatures at the same...Ch. 10 - Estimate the amount of water there could be in a...Ch. 10 - At its nearest, Venus comes within about 41...Ch. 10 - If you weigh 150 lbs. on the surface of Earth, how...Ch. 10 - Calculate the relative land area-that is, the...Ch. 10 - The closest approach distance between Mars and...
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- The 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_forwardIf we do find life on Mars, what might be some ways to check whether it formed separately from Earth life, or whether exchanges of material between the two planets meant that the two forms of life have a common origin?arrow_forwardLife on Earth exists because of oxygen in Earths atmosphere. True false? Explain your answer.arrow_forward
- Why is the simultaneous detection of methane and oxygen in an atmosphere a good indication of the existence of a biosphere on that planet?arrow_forwardSuppose that, decades from now, NASA is considering sending astronauts to Mars and Venus. In each case, describe what kind of protective gear they would have to carry, and what their chances for survival would be if their spacesuits ruptured.arrow_forwardIf the Viking missions were such a rich source of information about Mars, why have we sent the Pathfinder, Global Surveyor, and other more recent spacecraft to Mars? Make a list of questions about Mars that still puzzle astronomers.arrow_forward
- What evidence do we have that there was running (liquid) water on Mars in the past? What evidence is there for water coming out of the ground even today?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_forwardWhich of the following properties of Mars would be altered by the process of terraforming? its size its atmospheric chemistry its distance from the Sun its geological activity its magnetic field Even if we were to terraform Mars to give it an Earthlike climate, that climate would not be as stable as Earth's, due to Mars's lack of a large moon volcanic activity an iron core atmospheric nitrogenarrow_forward
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