Question

select the correct answer. which layer of earth is the densest and why is that so? a. the outer core is densest due to gravitational compression. b. the outer core is densest due to generation of radiogenic heat. c. the outer core is densest due to accretion. d. the inner core is densest due to gravitational compression. e. the inner core is densest due to generation of radiogenic heat.

Explanation:

The Earth's layers are the crust, mantle, outer core, and inner core. The inner core is the densest layer. Gravitational compression increases with depth. As we go deeper into the Earth, the weight of the overlying layers compresses the material in the inner core, making it denser. Radiogenic heat generation (related to radioactive decay) is more associated with processes like mantle convection and doesn't directly cause the inner core to be the densest. Accretion refers to the process of planet formation (accumulation of matter) and isn't the reason for the inner core's density. The outer core is less dense than the inner core.

Answer:

D. The inner core is densest due to gravitational compression.