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Author Question: When do black smokers occur? A) during plate tectonics movement B) during underwater volcanic ... (Read 20 times)

biggirl4568

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on: Jul 16, 2018
When do black smokers occur?
 
  A) during plate tectonics movement
  B) during underwater volcanic reactions
  C) components dissolve below the seafloor, but then precipitate when they contact cold water
  D) components squeezed from beneath the sea floor dissolve upon contact of cold water

Question 2

What apparent difference is there between a gneiss that is formed from igneous rock and one formed from sedimentary rock?
 
  A) crystal size
  B) mineral content
  C) age
  D) color


Sweetkitty24130

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

Answer: C

Answer to Question 2

Answer: B


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