ASTRONOMY (OER)
17th Edition
ISBN: 2810019838352
Author: OpenStax
Publisher: OpenStax
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Textbook Question
Chapter 10, Problem 16E
If 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.
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Students have asked these similar questions
Go to the home page for NASA’s Mars Exploration Program, and look for the latest evidence concerning recent water flows on Mars.
Write a few paragraphs describing the new evidence and what it tells us about the planet’s past.
Which of the following planetary traits is well established?
choose one of the following:
a) Mercury has a similar compositon to that of our moon, in that they both have a substantial metal content.
b) Venus rotates more rapidly than Earth, but in the opposite direction.
c) Earth's atmosphere exhibits a slightly stronger greenhouse effect than that seen on Venus.
d)Astronomers have precisely calculated the mass of Mercury thanks to artificial satellites sent from Earth.
Planetary scientists are hoping that the samples collected by the Perseverance Mars rover will eventually be collected by other robotic spacecraft and returned to Earth. Even if Perseverance could collect samples from all over Mars's surface, why wouldn't this tell us what the entire planet is made of?
Group of answer choices
The deep interior of Mars has had its composition altered (compared to the surface) by the impacts of asteroids that plunged almost all the way down to Mars's center.
Since Mars has a powerful magnetic field, it must have a liquid-iron portion of its core, and this material can't be collected by a rover on the surface.
Early in its history, Mars differentiated into layers of materials that had different densities, much like the Earth did.
Mars has such a low density that most of its interior must be made of liquid water and ice, so rocks from the surface simply won't be representative of the deep interior.
Chapter 10 Solutions
ASTRONOMY (OER)
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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- 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_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
- The average distance from Earth to Mars is 1.5 AU. If you send a command using radio waves (a form of light!) to a rover on the Mars surface, how long will you have to wait before you receive the response? Assume the rover responds immediately after it receives the commandarrow_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_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
- Part 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_forwardHow could you argue that mars has now or has at some point in the past had an atmosphere and flowing liquid on the surface?arrow_forwardHow can planetary scientists estimate the ages of the outflow channels and valley networks on Mars?arrow_forward
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