Question

Why are the amounts of gases in the atmosphere usually shown as percentages of dry air?

Answer 1

Answer:

Because they are the same. ... Air preasure is the result of the weight of a column of air preasure pusing down on an area.

Answer 2

Answer:

Because they are same . What are three ways in which the atmosphere is important to life on earth.It contains oxygen traps energy from the sun, and keep the Earth's water in, keep us from getting hit by meteriods .