(5) BIOGEO: atmospheric structure & composition

the density of air decreases with _______.

height

where is atmospheric pressure is highest?

at the surface

the troposphere includes __% of atmosphere mass

75

the troposphere is defined by

decreasing temperature with increasing altitude

the tropopause is

the boundary between the troposphere and the stratospherethe

tropopause is defined by

constant temperature with increasing altitude

the stratosphere is characterized by

temperature increases with altitude

the ozone layer is

a region in the earth’s stratosphere with a relatively high concentration of O3

O3 is formed by

photodissociation

what is the Ozone Hole?

depletion of O3 related to atmospheric chemistry, exacerbated by bromine, chlorine, and especially chlorofluorocarbons

What percent of the atmosphere is N2?

78%