Explain how the densities of each layer of the Earth are different.

The atmosphere and Earth's interior are layered by density. ... Earth's core, at its center, is denser than its crust. The lowest layer of the atmosphere is denser than the upper layer. Earth's liquid metal outer core has convection, which generates the magnetic field.

Explanation:

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Gravity pulls denser materials to the center of the earth, so it is basically a sphere of wrapping paper that gets denser and denser the more you unwrap the layers. The core is the most dense, and the crust is the least dense.

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aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.