The crust comprises two distinct layers of sial and:
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Answer:
the crust is composed of sial and sima
Explanation:
SIAl means silica and Alluminium
and SIMA SILICA AND MAGNESIUM
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the earth,s crust is made up of two distinct layers an upper layer called sial and the lower layer called sima . the sial layer consists of sllica and alumina an it's forms the continents.
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