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ipn [44]
4 years ago
11

Question 17 The Earth's average density is 5.5 g/cm" Yet the density of rocks at the surface are typically 2-4 g/cm". What does

that tell you about what the density must be closer to the center of the Earth? you about what the density
Geography
1 answer:
ELEN [110]4 years ago
3 0

Answer with explanation:

Since the density of the rocks at the surface of earth equals 2-4gm/cm^{3} which is much lesser than the average density of the earth equaling 5.5gm/cm^{3} thus we conclude the density of material closer is greater than 5.5gm/cm^{3}.This can be mathematically shown as under:

\rho _{earth}=\frac{\rho _{surface}+\rho _{core}}{2}\\\\5.5gm/cm^{3}=\frac{(2-4)gm/cm^{3}+\rho _{core}}{2}\\\\\therefore \rho_{core}=[2\times 5.5-(2-4)]gm/cm^{3}\\\\\therefore \rho_{core}=(7-9)gm/cm^{3}

Thus we conclude that the density of the matter closer to the center ranges between 7-9gm/cm^{3}

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