The air that we breathe is composed of approximately ________ ...

[iveyjurea]

The air that we breathe is composed of approximately ________ oxygen by volume.
 
  Fill in the blank(s) with correct word

Question 2

Which of the following statements is NOT true?
 
  A) The temperature of the mesosphere falls as you get farther from the earth's surface.
  B) The temperature of the stratosphere falls as you get farther from the earth's surface.
  C) The temperature of the stratosphere rises as you get farther from the earth's surface.
  D) The temperature of the troposphere falls as you get farther from the earth's surface.

[Tonyam972]

Answer to Question 1

21

Answer to Question 2

B

[iveyjurea]

Excellent

[zacnyjessica]

Thanks for the timely response, appreciate it