Mars Has a Sufficient Mass and a Low Enough Temperature

question 99

Multiple Choice

Mars has a sufficient mass and a low enough temperature that water molecules could exist in its atmosphere as vapor. One reason Mars atmosphere does not contain a significant amount of water vapor is that

• A) Mars formed in a part of the solar nebula that lacked oxygen.
• B) Mars formed in a part of the solar nebula that lacked hydrogen.
• C) All of the water vapor was released in the impact that formed Deimos.
• D) Ultraviolet radiation breaks the water molecule into less massive particles that can escape.
• E) The water molecule combines readily with chlorine to form hydrochloric acid.

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