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doit_the_clown doit_the_clown
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7 years ago
The Earth has an average density of 5500 kg/m3, although the density of rock on its surface is about 3000 kg/m3. What conclusion can be reached about the Earth's core from this observation?
A)   It consists of lower density material than surface rock.
B)   It must be composed of material with density several times that of the surface material.
C)   It must be very hot.
D)   It is made of material far denser than surface rock.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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hyponoticahyponotica
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7 years ago
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doit_the_clown Author
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7 years ago
Thank you, thank you, thank you!
choih94
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Yesterday
Smart ... Thanks!
cipcal
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2 hours ago
Good timing, thanks!
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