The surface of the continent is made up mostly of minerals like 'Silica' and 'Alumina'. true or false?
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Answer:
True
Explanation:
The main mineral constituents of the continental mass are silica and alumina. It is thus called sial (si-silica and al-alumina). The oceanic crust mainly consists of silica and magnesium; it is therefore called sima (si-silica and ma-magnesium)
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