Question

the middle layer of earth is known as the ____ Rocks change their form in a ___ manner​

Answer 1

1) MENTAL

2) ROCK CYCLE

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Answer 2

Answer: (a) Mental is the middle layer of the earth lies between crust and core. The average thickness of this layer is 100 to 2900 km. Silica and magnesium elements predominate in this layer so it is known as SIMA.  Density of the layer varies between 3.1 to 5.00. It has two layers: upper mantle and lower mantle.

(b)Rocks change their form in a cyclic  manner​.This process of transformation of the rock from one to another is called the rock cycle

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