The following text is about planetary science.
Mars's atmosphere, though much thinner than Earth's, produces weather patterns including dust storms that can envelop the entire planet for months. The thin atmosphere also means extreme temperature swings: daytime equatorial temperatures can reach 20°C, but nighttime temperatures plummet to -100°C. Scientists study Martian weather to understand how planets with different atmospheric conditions evolve and to plan for future human missions, where dust storms and temperature extremes would pose significant challenges.
According to the text, why do scientists study Martian weather?
Only to compare it with Earth's weather patterns
To understand planetary evolution and plan for human missions
Because Mars has the same atmosphere as Earth
To learn how to create dust storms on Earth
Correct Answer: B
Choice B is the correct answer. The text states scientists study Martian weather "to understand how planets with different atmospheric conditions evolve and to plan for future human missions."
- Evidence: Planetary evolution understanding; mission planning.
- Reasoning: Both scientific and practical motivations.
- Conclusion: Evolution knowledge and mission preparation drive research.
Choice A is incorrect because multiple purposes are given. Choice C is incorrect because the atmosphere is "much thinner." Choice D is incorrect because no creation on Earth is mentioned.