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Weather

TermDefinition
air mass a huge body of air similar temperature, humidity, and air pressure
air pressure a force resulting from the weight of air pushing down on an area
atmosphere the blanket of air and gases above Earth, mostly nitrogen
anemometer measures wind speed
barometer measures air pressure
cirrus feathery clouds high in the sky
cold front cold air is moving under warm air
condensation the process by which water vapor form small water droplets
convection warm air rising while cooler air sinks forms a cyclic pattern
cumulonimbus towering clouds with flat tops produce thunderstorms
cumulus clouds that look fluffy cotton balls and indicates fair weather
evaporation liquid heating and turning to a gas(water vapor)
fog a dense cloud of water vapor that forms just above the ground
front a boundary between air masses of different temperature and humidity
Greenhouse Effect a process on Earth in which gases in the atmosphere trap thermal energy(heat)
humidity the measure of the amount of moisture in the air
hygrometer an instrument used to measure humidity
mesosphere 3rd layer of atmosphere where most meteors burn up
meteorologist a scientist who studies weather
ozone oxygen forming near the surface when exhaust pollutants react with sunlight; three atoms of oxygen
precipitation hail, sleet, snow, rain
rain gauge measures precipitation
stratosphere 2nd layer of atmosphere where ozone is found
stratus smooth, gray clouds that cover the sky and block out sunlight; light rain and drizzle
temperature the measure of the amount of heat energy in the atmophere
thermometer measures the temperature of the air
thermosphere outermost and hottest layer of the atmosphere
tornado a swirling funnel shaped form of extreme weather with winds faster than 200 mph
troposphere 1st layer of the atmosphere where weather occurs
warm front the boundary where warm air is moving over cold air
weather the particular temperature and moisture in a location at a specific time
conduction heat transfer by direct contact
radiation heat transfer travels in waves
Created by: Susan_Johnson