Answer:
In geology, the term sial refers to the composition of the upper layer of Earth's crust, namely rocks rich in aluminium silicate minerals. It is sometimes equated with the continental crust because it is absent in the wide oceanic basins, but 'sial' is a geochemical term rather than a plate tectonic term.
Explanation:
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Answer:
There is a higher concentration of people who live in the northern hemisphere than the southern hemisphere.
Explanation:
A is not correct because the equatorial region is not densely populated, but it is actually sparsely populated.
B is not correct because the southern hemisphere doesn't have a higher concetration of people than the northern hemisphere.
C is not correct because if that was the case the population density would have been the highest either on the Equator or the poles, and that is not the case at all.
D is not correct because the population density is related to the concept of agricultural production.
E is correct because the northern hemisphere has a higher concentration of population than the southern hemisphere, and this is largely due to the fact that there is much more land on the northern hemisphere, thus a much larger area where there are suitable conditions for living.
I'm going to assume this is a True or False question so false, heat from the reaches the earth through radiation.