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
Provision (noun) the act of providing, or making previous preparation. Provision (noun) that which is provided or prepared; that which is brought together or arranged in advance; measures taken beforehand; preparation. Provision (noun) especially, a stock of food; any kind of eatables collected or stored; -- often in the plural. Provision (noun) that which is stipulated in advance; a condition; a previous agreement; a proviso; as, the provisions of a contract; the statute has many provisions. Provision (noun)