Give geographical reason :The upper layer of the crust is called Sial. – InterviewSolution

1.

Give geographical reason :The upper layer of the crust is called Sial.

Answer»

1. The rocks in the upper layer of the crust have predominance of the compounds of silicon and aluminium.

2. The word Sial is derived from the word Silica (Si) and Aluminium (Al). Therefore, the upper layer of the crust is called (Si + Al) Sial.

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