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Author Question: What materials make up Earth's core? A) Perovskite and silica B) Iron and nickel C) Olivine and ... (Read 82 times)

Evvie72

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on: Jul 16, 2018
What materials make up Earth's core?
 
  A) Perovskite and silica
  B) Iron and nickel
  C) Olivine and pyroxene
  D) Sulfur and aluminum

Question 2

The inner core is believed to rotate independently from the outer layers of Earth. Why is this possible?
 
  A) The immense interior pressures generate rotation.
  B) The inner core is separated from the mantle by the liquid outer core and can spin freely.
  C) Radioactive decay generates spin.
  D) Frictional drag pushes the inner core at a different rate than the rest of the planet.


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ririgirl15

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Reply #1 on: Jul 16, 2018
Answer to Question 1

Answer: B

Answer to Question 2

Answer: B


Evvie72

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Reply 2 on: Jul 16, 2018
Thanks for the timely response, appreciate it

amandanbreshears

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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