ILL MARK BRAINLIEST! a; What are the two most common gases in the atmosphere and what roles do they play?

b; How are humans changing the composition of the atmosphere?

c; What is the amount of water vapor in the air called?

d; What are the important greenhouse gases?

e; Why does air density decrease with increasing altitude?

f; What is the greenhouse effect?

check explanation

Explanation:

a; What are the two most common gases in the atmosphere and what roles do they play?

Nitrogen and Oxygen are the two most common gasses which take part in containing life one earth

b; How are humans changing the composition of the atmosphere?

Humans do various things that output Carbon Dioxide which is terrible for the atmosphere, some things humans do to release Carbon Dioxide are: Factories, Farms (Animal waste released CO2), and more

c; What is the amount of water vapor in the air called?

Absolute Humidity

d; What are the important greenhouse gases?

Methane, Carbon Dioxide, Nitrous Oxide

e; Why does air density decrease with increasing altitude?

The gravity is weaker from earths center, so at higher altitudes air molecules are less concentrated which makes it a hard time to breathe while at lower altitudes air molecules are more concentrated which allows us to breathe easier

f; What is the greenhouse effect?

The greenhouse effect, to keep it short and simple is the trapping of the suns warmth due to various greenhouse gasses in the atmosphere; some of the warmth the sun emits is bounced back into space while greenhouse gases hold on to it, this can be both benificial and extremely bad

sorghum farming likely spread with the bantu migration. there is your answer i had to get it wrong to get this right so i hope ya'll enjoy!