Question

Conclusion:

Answer 1

Answer:

The earth is made out of layers that separate according to their densities.

The density of each layer is affected by the composition of the material and the   amount of pressure it is under.

The thinnest and least dense layer is known as the Crust.

The layer under the most pressure is known as the core.

Such high amounts of pressure cause this layer to remain in a Solid State of matter even though the nickel and iron are at such a high temperature.

On the other hand, the outer core remains in a molten state of matter even though it is made out of the same materials as the inner core since there is not enough pressure to change it to a solid.

Explanation:

The above question now updated with the missing words provide information about how the compositional layers of the earth's crust are formed.

The three major determinants as already explained about how the layers have come to be are:

1. Composition of Material
2. Pressure on the material
3. and their density

The Crust (which is the outmorst layer) comprises of more silica.

The Mantle is a combination of silica, magnesium, and iron.

The core is a combination of oxygen, nickel iron and sulphur.

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