Hi, I'm an instructor at an online school, and my text says “ Air pressure is the amount of pressure the atmosphere places on the surface of Earth. Air pressure is usually measured as the weight of the column of air above a square meter (N/m2). As altitude increases, air density decreases and so does air pressure. Air pressure is also impacted by temperature. As temperature increases, the air pressure increases. Cooler air has lower air pressure.” And I got the following question from a colleague "Isn’t this backwards? The above is true in a sealed container, but not in the atmosphere." And I am really having trouble finding the right answer; almost everything I can find says that pressure and temperature are directly related, but I fear that they are referring to gas in a closed container but not specifying that. And anything I can find about the atmosphere gets confusing; some sources say there is a direct relationship, some say that when temperature rises the air becomes less dense and the pressure decreases, one says that temperature and pressure rise together and fall together and then in the next paragraph it says "Very cold temperatures can create areas of high air pressure because cold air has greater density and the concentration of molecules can raise the air pressure." So can someone clear this up for me? When air is in the atmosphere instead of in a closed container, what happens to the air pressure as the temperature increases? Thank you in advance!