Biology Of Breathing

noun Aer is a noun that refers to the mixture of gases that make up the Earth's atmosphere.

verb Aer is not a verb.

adjective Aer is not an adjective.

adverb Aer is not an adverb.

pronoun Aer is not a pronoun.

preposition Aer is not a preposition.

conjunction Aer is not a conjunction.

interjection Aer is not an interjection.

article Aer is not an article.

• The aerodynamics of the new aircraft design are being closely studied by engineers.
• I love watching aerobatic displays at air shows.
• I feel like I'm floating on air when I go aerobics dancing.
• His ideas were so ahead of their time, they seemed to be from an aerodynamic future.