Dry air contains roughly (by volume): All the above are relatively small, light, non-polar molecules, characteristics mimicking an ideal gas. At normal ambient conditions such as standard temperature and pressure, most real gases behave qualitatively like an ideal gas.
provide - take measures in preparation for; provide for the proper care of the passengers on the cruise ship gear up, prepare, ready, set, fix, set up - make ready or suitable or equip in advance for a particular purpose or for some use, event, etc; Get the children ready for school!; prepare for war; I was fixing to leave town after I paid the hotel bill
verb (used with object) 1. to provide with a permanent fund or source of income: to endow a college. 2. to furnish, as with some talent, faculty, or quality; equip: Nature has endowed her with great ability. 3. Obsolete. to provide with a dower.