The graph below plots the escape velocity of each planet along the vertical axis and its surface temperature along the horizontal. The lines plotted in the figure are the speeds of the fastest gas particles as a function of temperature for various gases. Which of the gases plotted in the diagram could be retained in the atmosphere of Mars? 
A) only CO2
B) only NH3
C) CO2, NH3, and O2
D) only H2
E) H2 and He
Correct Answer:
Verified
Q4: Which of the following supports the idea
Q8: Which of the solar system objects listed
Q10: The theory that Mercury shrank slightly when
Q11: Coronae on Venus are believed to be
A)impact
Q11: Besides Earth, which of the terrestrial planets
Q12: The geology of Venus appears to be
Q12: How rapidly a planet loses its atmosphere
Q13: That Mercury has a large iron core
Q13: The crust of Mars is believed to
Q16: The moons of Mars are believed to
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