how do sial differ from sima ?
in a tabular form.
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Sial is composed of silicon and aluminium.It is upper layer which forms a discontinuous cover over the Earth's crust and is entirely absent the ocean floor. Sima is composed of silicon and magnesium. This is the second layer below sial which forms the ocean base. It is also called oceanic crust.
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Answer:
the uppermost part of the earth is rich in silica and aluminium are called sial.
under the sial layer it is rich in silica and magnesium are called sima.
Explanation:
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