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Difficulty: HardThe Solar System and Planets

Match each planet in the Solar System with its primary distinguishing atmospheric or physical characteristic.

  • MercuryExhibits the largest day-to-night surface temperature variation in the solar system due to the absence of a heat-trapping atmosphere
  • VenusExperiences the highest surface temperature in the solar system due to a dense carbon dioxide atmosphere driving a runaway greenhouse effect
  • MarsPossesses a rarefied carbon dioxide atmosphere over a surface rich in oxidized iron minerals that give it a characteristic rust-red appearance
  • NeptuneFeatures an outer atmosphere with supersonic wind speeds and upper atmospheric methane that absorbs red light, yielding an intense azure color

Answer

Mercury matches with having the largest diurnal temperature swing due to lacking a substantial atmosphere; Venus matches with having the highest surface temperature driven by a runaway greenhouse effect; Mars matches with having a thin carbon dioxide atmosphere and iron-oxide rich surface; Neptune matches with supersonic atmospheric winds and methane-driven azure coloration.
Each planet is matched to its unique physical marker: Mercury to extreme day-night temperature swings caused by lack of atmosphere; Venus to peak surface temperatures caused by a dense greenhouse atmosphere; Mars to iron-oxide surface dust and thin air; and Neptune to supersonic winds and methane absorption.

Step-by-Step Solution

1
Analyze atmospheric density and thermal retention for inner planets
Venus maintains the highest surface temperatures via its thick carbon dioxide greenhouse envelope, whereas Mercury experiences extreme temperature swings between day and night because it lacks an insulating atmosphere.
Atmospheric composition and density dictate planetary heat distribution and surface conditions.
2
Examine surface composition and gas composition of the remaining terrestrial candidate
Mars is uniquely identified by oxidized iron minerals on its surface and a low-pressure carbon dioxide atmosphere.
Iron oxidation accounts for Mars' distinct geological coloring and distinguishes it from other terrestrial bodies.
3
Evaluate outer ice giant atmospheric dynamics and spectral absorption
Neptune is characterized by the fastest recorded planetary winds and methane absorption in its atmosphere giving it a deep azure hue.
Methane absorbs longer red wavelengths and scatters blue light in the atmospheres of the outer ice giants.

Key Concept

Atmospheric and geological characteristics of terrestrial and outer Jovian planets
Estimated Time:1m 30s
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Topics

The Solar System and Planets

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