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Celsius uses 0 as the temperature when water freezes. This would be less than useless on Mars, because water would almost always be frozen on Mars. The boiling point of water would be more effective. Why?

Because water boils at different temperatures depending on air pressure, and the air pressure on Mars is completely different to that of Earth's, you would need a thermometer where 100 degrees or maybe 0 degrees would be the boiling point of water there.

The lower the atmospheric pressure is, the lower the temperature needs to be for water to boil. So, because on Mars the pressure is close to being a complete vacuum, water would boil at about 0 degrees C.

Since it's about -60 degrees C on Mars, if 100 degrees Martian units was your boiling point, than (simple math 100- 60) +60 degrees Martian units might be a reasonable average temperature (using this method avoids always having negative numbers for your temperature).

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12y ago

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