Chapter 3 Flashcards
water vapor is the source of all
condensation and precipitation
essentially water on earth is considered
conserved from the water cycle
changing states requires a what
energy transfer in the form of heat
latent heat that must be
added or removed for a phase change
phase change requires
addition of heat
phase changed could be
melting, evaporation, and sublimation
phase changes requires the removal of heat
freezing, condensation, and deposition
saturation
the max quantity of water vapor air van hold at a given temp and pressure
warm air can hold more water vapor than
cold air
what is relative humidity
ratio of the air’s actual amount of water content compared with the amount of water air can hold at that temperature and pressure
2 ways relative humidity can be changed
add or remove water
change temperature
when the air is saturated and further cooling begins what happens
condensation (ex. dew, clouds)
what is dew point
the temperature to which air would have to be cooled for saturation to occur
for every 10C increase in temp the water vapor saturation does what?
doubles
high dew point indicates
moist air
low dew point indicates
dry air
when air temp and dew point are close
the RH is high
when air temp and dew point are far apart
the Rh is low
what is air pressure
the pressure exerted by weigh of air above
air pressure is exerted in what direction
in all directions equally
what is air pressure measured by
a barometer
increase an air temp does the barometer increase or decrease in reading
increases