Author Question: How did the core and mantle form? What will be an ideal response?[br][br][b][color=green]Question ... (Read 64 times)

burton19126 · **on:** Jul 16, 2018

How did the core and mantle form?

What will be an ideal response?

Question 2

What did Sir Isaac Newton do during the seventeenth century?

A) calculate that a rotating planet would not be perfectly spherical
B) determine the mass of Earth
C) determine that the Earth has a distinct concentration of high-density material near the center
D) use simple surveying and measurements of shadows in sunlight to estimate Earth's size

izzat · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

Answer: Earth's metallic core separated from the mantle by planetary differentiation in a global magma ocean. Very dense metallic compounds separated from lower-density silicate compounds to produce a metallic core and a silicate mineral mantle. As Earth cooled, crystallization and inward settling of iron metal caused distinction of a solid inner core and a remaining molten outer core. The mantle solidified into silicate minerals with a chemical composition similar to peridotite. Very high temperatures within early Earth resulted from collisions with accreting embryos and higher hear production by radioactive decay.

Answer to Question 2

Answer: A