21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 8, Problem 29QP
To determine
Some of geological evidence suggesting that Mars once had liquid on its surface.
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Which 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 nitrogen
Evidence exists that Mars may have had oceans 0.500 km deep in its early
history. We don't know what the atmospheric pressure on Mars was back then,
but some studies suggest it may have been as high as 50,000 Pa. What would
have been the highest pressure at the bottom of these oceans? Density of water
is 1000 kg/m³, gmars = 3.71 m/s².
How could you argue that mars has now or has at some point in the past had an atmosphere and flowing liquid on the surface?
Chapter 8 Solutions
21st Century Astronomy
Ch. 8.1 - Prob. 8.1CYUCh. 8.2 - Prob. 8.2CYUCh. 8.3 - Prob. 8.3ACYUCh. 8.3 - Prob. 8.3BCYUCh. 8.4 - Prob. 8.4CYUCh. 8.5 - Prob. 8.5CYUCh. 8.6 - Prob. 8.6CYUCh. 8 - Prob. 1QPCh. 8 - Prob. 2QPCh. 8 - Prob. 3QP
Ch. 8 - Prob. 4QPCh. 8 - Prob. 5QPCh. 8 - Prob. 6QPCh. 8 - Prob. 7QPCh. 8 - Prob. 8QPCh. 8 - Prob. 9QPCh. 8 - Prob. 10QPCh. 8 - Prob. 11QPCh. 8 - Prob. 12QPCh. 8 - Prob. 13QPCh. 8 - Prob. 14QPCh. 8 - Prob. 15QPCh. 8 - Prob. 16QPCh. 8 - Prob. 17QPCh. 8 - Prob. 18QPCh. 8 - Prob. 19QPCh. 8 - Prob. 20QPCh. 8 - Prob. 21QPCh. 8 - Prob. 22QPCh. 8 - Prob. 23QPCh. 8 - Prob. 24QPCh. 8 - Prob. 25QPCh. 8 - Prob. 26QPCh. 8 - Prob. 27QPCh. 8 - Prob. 28QPCh. 8 - Prob. 29QPCh. 8 - Prob. 30QPCh. 8 - Prob. 31QPCh. 8 - Prob. 32QPCh. 8 - Prob. 33QPCh. 8 - Prob. 34QPCh. 8 - Prob. 35QPCh. 8 - Prob. 36QPCh. 8 - Prob. 37QPCh. 8 - Prob. 38QPCh. 8 - Prob. 39QPCh. 8 - Prob. 40QPCh. 8 - Prob. 41QPCh. 8 - Prob. 42QPCh. 8 - Prob. 43QPCh. 8 - Prob. 44QPCh. 8 - Prob. 45QP
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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_forwardWhat surface features on Mars today indicate that there was significant water erosion in the past?arrow_forwardExplain the runaway refrigerator effect and the role it may have played in the evolution of Mars.arrow_forward
- Since Mars has an atmosphere and it is composed mostly of a greenhouse gas, why isn't there a significant greenhouse effect to warm its surface?arrow_forwardWhich of these surface features, discovered by the first spacecraft mission (Mariner 4) to Mars, was NOT expected to be seen on Mars? Answers: A. craters B. giant volcanoes C. expansive canyons D. canals E. running waterarrow_forwardPart of the "Mars Direct" mission plan involves rotating the spacecraft on its way to Mars to provide the astronauts with a simulation of Martian gravity. True False Due to the need to catch the correct launch window for the trip home, the total duration for a round trip to Mars will have to be at most 18 months at least 18 months at least 30 months at most 12 months at least 24 monthsarrow_forward
- List the evidence that suggests the past (and possibly present) existence of liquid water onthe surface of Marsarrow_forwardOne source of information about Mars has been the analysis of meteorites from Mars. Since no samples from Mars have ever been returned to Earth from any of the missions we sent there, how do we know these meteorites are from Mars? What information have they revealed about Mars?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_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_forwardWhat were the canals on Mars eventually found to be? How do they differ from the outflow channels and valley networks on Mars?arrow_forwardWhat evidence can you give that Venus once had significant amounts of water? Where did that water come from? Where did it go?arrow_forward
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