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
support. 1  to bear or hold up (a load, mass, structure, part, etc.); serve as a foundation for. 2  to sustain or withstand (weight, pressure, strain, etc.) without giving way; serve as a prop for. 3  to undergo or endure, especially with patience or submission; tolerate.