QUESTION TEXT: The largest volcano on Mars rises 27…
QUESTION TYPE: Must Be True
FACTS:
- Mars has a really, really big volcano.
- Earth couldn’t have a volcano that big, even if Earth’s gravity were low like Mars’ gravity.
- Earth’s crust is too thin, and the volcano would sink.
ANALYSIS: We know that Mars has a thicker
crust, at least in some spots. Otherwise, the volcano
would sink.
___________
- We’re not told anything about erosion. We have no idea why Mars has a thicker crust.
- Who knows? Mars’ crust might be thick enough to support big volcanoes in many places.
- We know one Martian volcano is really tall. But maybe most Martian volcanoes are tiny, and they drag down the overall average.
- CORRECT. Mars’ crust has to be thicker at least at the place where the giant volcano is. Otherwise the volcano would sink.
- Who knows? There may be many factors apart from crust thickness that determine how big a volcano will be.
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