Geography, asked by priyanshi346, 10 months ago

answer the above questions

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Answered by ishpreet15

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1 concentric layers 2) crust is upper most layer 3) silica and alumina 4) Sial refers to the earth's crusts upper layer, it is made up of rocks abundant in silicate and aluminium based minerals. ... Sima is the earth's crusts lower layer. 5) it is known as core . it is divided into two inner and outer

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