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Author Question: Much of Tibet lies at altitudes over 18,000 feet where the pressure is about 500 mb. At such ... (Read 28 times)

robinn137

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on: Jul 13, 2018

Much of Tibet lies at altitudes over 18,000 feet where the pressure is about 500 mb. At such
  altitudes, the Tibetans are above roughly:a.
   10 of the air molecules in the atmosphere.
  b. 25 of the air molecules in the atmosphere.
  c. 50 of the air molecules in the atmosphere.
  d. 75 of the air molecules in the atmosphere.



Question 2

Since the turn of this century, CO2 in the atmosphere has:a.
   been increasing in concentration.
  b. been decreasing in concentration.
  c. remained at about the same concentration from year to year.
  d. disappeared entirely.



olderstudent

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Reply #1 on: Jul 13, 2018
Answer to Question 1

c

Answer to Question 2

a


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