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Earth's atmosphere is primarily composed of _____.
a. argon
b. oxygen
c. nitrogen
d. carbon dioxide user: air pressure _____ with elevation.
a. increases
b. decreases
c. does not change

Respuesta :

C for the first one and B for the second I do believe
mysticBob720069

Answer:

C and B people said i got it correct on the question page

Explanation:

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