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Author Question: The concentration of ____________________ is close to 21 percent (by volume) in the upper ... (Read 72 times)

pragya sharda

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The concentration of ___________________ _ is close to 21 percent (by volume) in the upper stratosphere (the same concentration as in the trophosphere), but without proper breathing apparatus you would not be able to survive there.
   
  Fill in the blank with correct word.

Question 2

The ozone hole is located over ___________________ _.
   
  Fill in the blank with correct word.



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tofugiraffe

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Answer to Question 1

ANSWER: oxygen

Answer to Question 2

ANSWER: Antarctica




pragya sharda

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Reply 2 on: Jul 13, 2018
YES! Correct, THANKS for helping me on my review


nguyenhoanhat

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Reply 3 on: Yesterday
Wow, this really help

 

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