median
don steward
mathematics teaching 10 ~ 16

Saturday, 24 May 2014

comparing Earth with Mars

[JPL/NASA]




























roughly (and as far as we know)

radius Earth = 6371 km
radius Earth's core = 3485 km
Earth's crust = 40 km thick

radius Mars = 3389 km
radius Mars' core = about half the Earth's (will be known more accurately in 2016)
Mars' crust = 50 km thick

what fraction of the whole Earth is the Earth's core?
for Mars?

how many times bigger is the Earth's crust compared to Mars' crust?

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