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

What was the first official pair of sister cities?

Which describes the solid flying debris from a volcano

What types of jobs typically are found in ghetto, inner-city neighborhoods? a. low-wage positions, typically in retail outlets, that require little education b. professional positions with banks, doctors' offices, and other similar businesses c. hourly factory and manufacturing positions d. positions that require advanced education, such as those in financial or technology firms select the best answer from the choices provided.