Author Question: What process accounts for the layers found in Earth? a. Plate tectonics b. Accretion c. Density ... (Read 69 times)

Yi-Chen · **on:** Aug 22, 2018

What process accounts for the layers found in Earth?
a. Plate tectonics
b. Accretion
c. Density stratification
d. Subduction

Question 2

The composition of the Milky Way does not include:a.
stars
b. gases
c. dust
d. galaktos

cupcake16 · **Reply #1 on:** Aug 22, 2018

Answer to Question 1

ANS: C
Heavy elements like iron and nickel pulled inward towards the core while lighter materials like oxygen
and silicon rose toward the surface. The Earth now has distinct interior layers separated by their
density. Information can be found in the section Earth, Ocean, and Atmosphere Accumulated in Layers
Sorted by Density.

Answer to Question 2

ANS: D
The Milky Way galaxy is made up of stars, gas, dust, and debris. As with any galaxy, it is held in place
by gravity. The Milky Way galaxy is named after the Greek galaktos, which means milk.
Information can be found in the section Stars and Seas