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Author Question: Which of the following is considered a variable gas in Earth's atmosphere? a. water vapor b. ... (Read 87 times)

waynest

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on: Jul 13, 2018
Which of the following is considered a variable gas in Earth's atmosphere?
   a. water vapor
   b. nitrogen
   c. oxygen
   d. argon
   e. helium

Question 2

In a volume of air near Earth's surface today, ____ occupies 78 percent and ____ nearly 21 percent.
   a. nitrogen; oxygen
   b. hydrogen; oxygen
   c. oxygen; hydrogen
   d. nitrogen; water vapor
   e. hydrogen; helium


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Sweetkitty24130

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

ANSWER: a

Answer to Question 2

ANSWER: a


waynest

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Reply 2 on: Jul 13, 2018
Thanks for the timely response, appreciate it

okolip

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Reply 3 on: Yesterday
Excellent

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