Which phrases describe air pressure? check all that apply.

decreases with denser air
decreases as altitude increases
equals mass divided by volume
results from a column of air pushing on an area
decreases due to fewer air particles pushing down

d is

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.