객관식
Which of the following best describes what thermal energy refers to?
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8. Thermochemistry
Nature of Energy
객관식
Why is Venus the hottest planet in the solar system, even though Mercury is closer to the Sun?
A
Venus is closer to the Sun than Mercury.
B
Venus rotates faster than Mercury, causing more friction and heat.
C
Venus absorbs more solar energy because its surface is darker than Mercury's.
D
Venus has a thick atmosphere rich in CO_2 that traps heat through the greenhouse effect.
검증된 단계별 안내1
Understand that the temperature of a planet depends not only on its distance from the Sun but also on its atmospheric properties.
Recall that Mercury, although closer to the Sun, has a very thin atmosphere, which means it cannot retain much heat and experiences extreme temperature fluctuations.
Recognize that Venus has a very thick atmosphere composed mainly of carbon dioxide (CO_2), a greenhouse gas that traps heat effectively.
Learn about the greenhouse effect: solar radiation passes through the atmosphere and warms the planet's surface, but the thick CO_2 atmosphere traps the infrared radiation emitted by the surface, preventing heat from escaping into space.
Conclude that this trapped heat causes Venus to have a much higher average surface temperature than Mercury, making it the hottest planet in the solar system despite being farther from the Sun.
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