the amount of the sun's energy that reaches earth at a given time and place
the conditions present in the troposphere at any given time
is made up in 99 % of the air we breath _____ and oxygen
the force put on a given area by the weight of the air above it
the layer closest to Earth, where almost all weather occurs; the thinnest layer
an instrument used to measure air pressure
is made up in 99% of the air we breath nitrogen and ____
the layer of air that surrounds the earth
the levels of the four layers of the atmosphere are determined by sudden changes in ___ at each level.
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