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weather vocab

genoa middle school 2015

atmosphere the mixture of gasses that surrounds earth
air pressure the measure of the force with which particles in the air push on an area
troposphere lowest layer of the atmosphere
stratosphere the layer above the troposphere
mesosphere the layer above the stratosphere
ionosphere reflects radio waves
exosphere the layer in outer space with thin air
thermosphere the upper most layer of the atmosphere
ozone layer protects earth by absorbing large amounts of harmful radiation from the sun
greenhouse effect process by which gasses in the atmosphere absorb and give off infrared radiation
temperature measure of the average kinetic energy of particles
thermal energy the total kinetic energy of particles
thermal expansion increase in volume that results in an increase in temperature
heat energy that is transferred between objects that are at different temperatures
radiation heat transferred by electromagnetic waves
convection transfer of energy by the movement of matter
conduction transfer of energy from one object to another through direct contact
wind movement of air caused by difference in air pressure
Coriolis Effect the apparent ocurring path of moving objects from otherwise straight path due to earths rotation
Jet Stream narrow belts of high speed winds that blow from east to west
local wind movement of air over short distances
sea breeze wind blowing from the water to land
land breeze wind blowing towards the water
mountain breeze air along the mountain slopes cool and move towards the valley
valley breeze warm air in the mountain slopes warmer than the valley air uneven heating
global wind create global wind patterns from place to place
trade winds cool air over hoarse latitude sinks and produces high pressure system, blow towards and away from equator
westerlies blow west to east
polar easterlies cool air sinks and flows back to lower latitude
doldrums calm area around the equators, weak area low pressure system
horse latitudes air stops moving and sinks
weather condition of earths atmosphere at a certain time and place
humidity the amount of water vapor in the air
relative humidity the amount of water vapor in the air compared to amount of water vapor needed to reach saturation
dew point temperature at which more condensation than evaporation occurs
precipitation any form of water that falls from a cloud
cirrus feathery, whispery, made of ice crystals. they form when the wind is strong
cumulus heap or pile. the form in fair weather
stratus spread out, form in flat layers
air pressure (density) force of air molecules pushing on an area. They both decrease with altitude
high pressure system air sinks slowly
low pressure system air comes together and rises sad weather rainy,cloudy
air mass large volume of air in which temperature and moisture content are nearly the same throughout
front (boundry) cool mass that is more dense than warm mass
warm front a warm air mass following a retreating cold air mass
cold front cold air moves under warm air
stationary front not enough wind so 2 air masses remain in one place
occluded mixture
evaporation cool mass that is more dense than warm mass
condensation water vapor cools and changes from a gas to a liquid
runoff the excess of water
anemometer measures wind speed
wind vanes determines the direction of the wind
Created by: avahampton