With Daytime Temperatures That Can Reach 430°C,why Is Nighttime on Mercury

question 21

Multiple Choice

With daytime temperatures that can reach 430°C,why is nighttime on Mercury so cold?

• A)Because the year is so short,there isn't enough time for the heat to build up in the equatorial regions.
• B)With very little atmosphere,heat is quickly lost back into space.
• C)The weak gravitational field doesn't retain the daytime's heat.
• D)The solar winds quickly dissipate all heat on the planet's dark side.

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