Earth Has an Average Density of 5500 Kg/m³,although the Density

question 462

Multiple Choice

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 Earth's core from this observation?

• A) Earth's core consists of lower-density material than surface rock.
• B) Earth's core must be composed of material with density several times that of the surface material.
• C) Earth's core must be very hot.
• D) Earth's core is made of material far denser than surface rock.

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Sunk Cost

Costs that have already been incurred and cannot be recovered or reversed.

Model 240 Machine

A hypothetical or specific name for a machine, possibly denoting a particular model or type used in manufacturing or industrial settings.

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The amount of revenue remaining after deducting variable costs, available to cover fixed costs and contribute to profits.

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