4082497
Description
Quiz by Rebekkah Gresh, updated more than 1 year ago
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Created by Rebekkah Gresh
over 8 years ago
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Question 1
Question
The polar regions of Mars have a surface layer of Carbon Dioxide (CO2), but the bulk of frozen material is:
Answer
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Permafrost rocks
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Permanently frozen water ice
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Frozen hydrogen
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Frozen nitrogen
Question 2
Question
According to the book, what evidence and features may indicate the Mars once had liquid water? (Check all that apply)
Answer
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What appears to be "river channels" are on the surface, indicating that water must have flowed.
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Presence of "islands" around rims of craters, indicating that water likely flowed in the past.
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Possible dried river deltas with fans of sediment about 13 kilometers wide.
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Fossilized sea life (bacteria and algae) have been found.
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A "Crater Lake" that seems to have terraces that resemble old beaches.
Question 3
Question
In the past, Mars had a [blank_start]hot interior[blank_end], which allowed for volcanism to take place on the planet. When [blank_start]volcanoes erupt[blank_end], they [blank_start]replenish gasses[blank_end] in the atmosphere, and [blank_start]increase[blank_end] the amount of CO2, a well-known greenhouse gas, making the atmosphere [blank_start]thicker[blank_end]. The greenhouse effect, in addition to a [blank_start]higher[blank_end] atmospheric pressure allowed for the surface temperature to be [blank_start]warmer[blank_end], and for [blank_start]liquid water[blank_end] to be present on the surface.
Answer
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hot interior
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cold interior
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volcanoes erupt
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meteors strike the surface
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rivers flow
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earthquakes occur
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replenish gasses
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remove gasses
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increase
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decrease
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thicker
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thinner
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higher
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lower
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warmer
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colder
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liquid water
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frozen water
Question 4
Question
Mars' atmosphere is made of mostly Carbon Dioxide (CO2), a well-known greenhouse gas, in fact its atmosphere closely mimics Venus' atmosphere. Greenhouse gasses trap heat in a planet's atmosphere, and increases the temperature. If this is true, why doesn't Mars' have a similar temperature to Venus?
Answer
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Mars' atmosphere has a very low density, so the greenhouse effect is much weaker.
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Mars is so far from the Sun that it doesn't receive enough heat to experience the greenhouse effect.
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Mars' strong seasonal winds mix up the atmosphere, so any heat it traps becomes lost again.
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Mars' weak magnetic field causes the atmosphere to be lost constantly, so it cannot have a greenhouse effect.
Question 5
Question
Why does Mars not have liquid water on its surface?
Answer
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The low atmospheric pressure causes the water to "boil off"
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The high atmospheric pressure causes the water to "boil off"
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The cold temperatures freeze all the water, though this ice covers large portions of the surface.
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The cold temperature causes the water to become gaseous.
Question 6
Question
Eventually Phobos (one of Mars' moons) will spiral in and crash into Mars due to tidal drag.
Answer
- True
- False
Question 7
Question
Deimos and Phobos, Mars' moons, are thought to be captured asteroids.
Answer
- True
- False
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