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Author Question: A scientist identifies a rock sample as rhyolite. Why did he do so? A) He observed that the rock ... (Read 77 times)

jrubin

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on: Jul 16, 2018
A scientist identifies a rock sample as rhyolite. Why did he do so?
 
  A) He observed that the rock has a lot of silica, making it mafic.
  B) He observed that the rock has a lot of silica, making it ultra-mafic.
  C) He observed that the sample has little silica, making it felsic.
  D) he observed that the sample has a lot of silica, making it felsic.

Question 2

A scientist identifies a rock sample as andesite. Why did he do so?
 
  A) He observed that the rock has a lot of silica, making it mafic.
  B) He observed that the rock has a lot of silica, making it ultra-mafic.
  C) He observed that the rock has a decent amount of silica, making it intermediate.
  D) He observed that the sample has little silica, making it felsic.


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Brummell1998

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

Answer: D

Answer to Question 2

Answer: C


jrubin

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Reply 2 on: Jul 16, 2018
Excellent

xiaomengxian

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

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