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
a clause in a legal instrument, a law, etc., providing for a particular matter; stipulation; proviso. 2. the providing or supplying of something, especially of food or other necessities. 3. arrangement or preparation beforehand, as for the doing of something, the meeting of needs, the supplying of means, etc. 4. something provided; a measure or other means for meeting a need.