Why was liquid water more common underground than on the surface during the Hesp
ID: 117736 • Letter: W
Question
Why was liquid water more common underground than on the surface during the Hesperian?
Active volcanoes helped to keep the subsurface warm
The atmospheric pressure was too low for liquid water to exist at the surface
The temperature was too cold for liquid water to exist at the surface
The range of temperatures that liquid water was stable at was limited by the low atmospheric pressure, and the temperature underground is more consistent
Active volcanoes helped to keep the subsurface warm
The atmospheric pressure was too low for liquid water to exist at the surface
The temperature was too cold for liquid water to exist at the surface
The range of temperatures that liquid water was stable at was limited by the low atmospheric pressure, and the temperature underground is more consistent
Explanation / Answer
The Hesperian is a geologic system and time period on the planet Mars characterized by widespread volcanic activity and catastrophic flooding that carved immense outflow channels across the surface. The Hesperian is an intermediate and transitional period of Martian history. During the Hesperian, Mars changed from the wetter and perhaps warmer world of the Noachian to the dry, cold, and dusty planet seen today. Volcanism became the primary geologic process on Mars, producing vast plains of flood basalts and broad volcanic constructs. Liquid water became more localized in extent and turned more acidic as it interacted with SO2 and H2S to form sulfuric acid.
So the answer is option A(active volcanoes helped to keep the subsurface warm)
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