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प्रश्न
Name the two broad divisions the earth's crust is divided, depending on chemical composition.
विकल्प
Lithosphere, hydrosphere
SIAL, SIMA
Core, Mantle
Crust, Asthenosphere
MCQ
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उत्तर
SIAL, SIMA
Explanation:
The Earth's crust is chemically divided into two main layers:
- SIAL (Silica and Aluminium) forms the continental crust and is lighter and less dense.
- SIMA (Silica and Magnesium) forms the oceanic crust and is denser than SIAL.
- These divisions are based on their chemical composition, where SIAL is richer in aluminium and SIMA is richer in magnesium.
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