Question

How does density affect earth's layers?

Answer 1

The density does not affect, is the affection of pressure and temperature

Explanation:

In other words, at larger pressures and temperatures you get more density, that's why the center of the earth is solid and its circundant cap is liquid, cause in the center the extreme pressure compresses the atoms into the solid state, and in the nearness, which pressure is less it permits liquid state, of course we're talking of iron, nickel, gold and other heavy metals with fusion limit of above 1000ºC at normal pressure