The layer just below the crust is called the ________.

sial

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sima

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mantle

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core

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Solution

The correct option is D mantle
The layer just below the crust is called the mantle. This layer is the layer of basalt rock which is heavier than the topmost layer. The density of this layer varies from 3.1 to 5.00. The average thickness of this layer is 100 to 2900 km. Silica and magnesium elements predominate and it is popularly known as SIMA.

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Question 8

The outermost layer of the earth is called
(a) mantle
(b) outer core
(c) crust
(d) inner core

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