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Evidence
for iron core
-
Mercury's average density
is 5430 kg/m3
-
Earth's is 5520 kg/m3
-
Surface rock density on Earth
is 3000 kg/m3
-
Obviously something dense
inside Earth (iron core)
-
Some density enhancement
due to compression from upper layers
-
paper filled plastic bag
analogy
-
Uncompressed densities:
-
Earth = 4400 kg/m3
-
Mercury = 5300 kg/m3
-
Therefore Mercury has more
iron
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