How much of earth's atmosphere is made up of nitrogen and oxygen?
a. between 25 and 75 percent
b. close to 99 percent
c. less than 1 percent
d. 100 percent

The right answer is the option B. Close to 99 percent. The atmosphere is a mixture of gases: nitrogen, oxygen, CO2, H2O, argon, among others. Nitrogen is about 78% and oxygen is about 21%, so they two together constitute about 99 percent of the Earth's atmosphere.

It will take 1.1 hour to reach New York