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Author Question: What process accounts for the layers found in Earth? a. Plate tectonics b. Accretion c. Density ... (Read 31 times)

Yi-Chen

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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



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cupcake16

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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



Yi-Chen

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Reply 2 on: Aug 22, 2018
:D TYSM

sarah_brady415

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Reply 3 on: Yesterday
Excellent

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