4 ms·

So you could cover the entire surface with 1.1 meters of ice. Does this mean Mars has a higher water-to-surface-area ratio than Earth?

• jstanley 12y ago
  Well let's see, 70% of Earth is already covered in water, and the average depth of that is significantly greater than 1.1 metres. So, no, I don't think Mars has a higher water-to-surface-area ratio than Earth. Not by a long shot :)
  • sjs382 12y ago
    Well, surface area has a lot to do with the terrain. If Mars were a perfect sphere (which it's not), then it wouldn't take much water at all to have a high surface area water::land ratio
    • thret 12y ago
      Yes, I am not sure if they calculated this based on Mars being a perfect sphere or not. I did find this interesting image of all the water on Earth, compared to the size of Earth: http://water.usgs.gov/edu/gallery/global-water-volume.html http://water.usgs.gov/edu/gallery/global-water-volume.html
      • marcolinux 12y ago
        What a incredible image! If a picture is worth a thousand words, this one is a very representative one. Very well done. Congratulations to the team.