The inner core is solid because
A) it is composed of iron and nickel.
B) the surrounding outer layers act as a blanket to insulate the core.
C) pressure from the weight of the surrounding layers prevents the inner core from melting.
D) None of these, for the inner core is not solid, but liquid.
C
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The utility of a specific place
A) varies directly with its distance from a person's primary place of residence. B) is unaffected by the friction of distance. C) is the same for all people. D) is a measure of the value and importance of that place to a certain person or group.
Which of the following planets has the strongest greenhouse effect?
A. Mars B. Earth C. Venus D. Pluto
The pollination of an orange tree's flowers by honeybees best illustrates
A) amensalism. B) parasitism. C) commensalism. D) mutualism.
What is meant by fossil fuel proven reserve?
What will be an ideal response?