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what is weather?
state of the atmosphere at a given time and place includes precipitation, clouds, and storms.
meteorology?
study of weather and how the atmosphere heats and cools
climatology
study of earths long tern weather and how climate controls the climate and determines it in an area
wind chill scale:
chart that converts the actual tempature outside to the temp the body would feel if exposed to the air and wind
frostbite
frozen body tissue
humidity:
amount of moisture in the atmosphere make hot temps hotter and cold temps colder
transpiration
essentially evaporation of water from plant leaves
air pressure
changes in air pressure, earspop etc
how much of the atmosphere is nitrogen (%)
78%
how much of the atmosphere is oxygen (%)
21%
dew point
atmospheric temp below which water droplets begin to condense and dew is formed
air pressure
weight of the air as it pushed down upon the earths surface
which is heavier? dry air or wet air
dry air
barometer:
an instrument to measure air pressure mercury and aneroid
two ways air pressure is reported
mercury and millibar
low pressure means…
the air is rising-warmer and more humid air.
high pressure means…
air is falling- cooler and dryer air
isobars:
a line that joins points having the same air pressure (remeber weather maps)
Coriolis force:
the tendency of an object moving freely over the earths surface to curve away from its path of travel.