Geography
What is the composition of the earth's crust?
Earth's Structure
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Answer
The crust of the earth is a sphere of solid rocks. It is only 1% of earth's mass. It is made up of rocks with large content of silicates, feldspar, mica etc.
The crust is divided into two broad divisions- SIAL and SIMA. SIAL is composed of Silica and Aluminium while SIMA is composed of Silica and Magnesium.
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