ashleyshadowdem
ashleyshadowdem ashleyshadowdem
  • 14-04-2015
  • Geography
Answered

How much of Earth's atmosphere is made up of nitrogen and oxygen?
A. 100 percent
B. Between 25 and 75 percent
C. Close to 99 percent
D. Less than 1 percent

Answer :

toltecavsmaya
toltecavsmaya toltecavsmaya
  • 14-04-2015
78% nitrogen, 21% oxygen,

Good luck 
Answer Link
thompzac
thompzac thompzac
  • 14-04-2015
C: close to 99% percent because it is made up of 78% nitrogen and 21% oxygen.

-Enjoy!=)
Answer Link

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