Define Crust of the Earth
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Answer:
The uppermost layer of the Earth is called crust.
Explanation:
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The uppermost layer over the earth’s surface.
•It is the thinnest of all the layers.
•It is about 35 km. on the continental masses and only 5 km. on the ocean floors.
•The main mineral constituents of the continental mass are silica and alumina. It is thus called si-al (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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