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Weather

TermDefinition
map a flat, 2-dimensional drawing of land and water
globe a spherical scale model of the earth
latitude geographic coordinate that specifies the north and south of the equator
longitude distance measured in degrees east or west from an imaginary line that goes from the North Pole to the South Pole and that passes through Greenwich, England
hemisphere a half of the earth, usually divided into northern and southern halves by the equator, or into western and eastern halves by and imaginary line passed through the poles
weather the state of the atmosphere at a place and time as regards heat, dryness, sunshine, wind, precipitation
climate the average weather conditions in an area over a long period
clouds a collection of millions of tiny water droplets suspended in the air
condensation the process of changing from gas to liquid
cirrus clouds white wispy clouds that form at high altitudes and are always made up of ice crystals
hygrometer a tool used to measure the amount of water vapor in the air
cumulus cloud fair weather clouds with white puffy tops and dark flat bottoms
stratus cloud lowest clouds that cover the sky like a thick grey blanket
cumulonimbus cloud a huge vertical cloud that can produce a thunderstorm
nimbo/nimbus precipitating cloud, such as a nimbostratus or cumulonimbus cloud
rain moisture condensed from the atmosphere that falls visibly in separate drops
freezing rain rain that freezes on impact with the ground or solid objects.
sleet a form of precipitation consisting of ice pellets, often mixed with rain or snow.
snow atmospheric water vapor frozen into ice crystals and falling in light white flakes or lying on the ground as a white layer.
hail pellets of frozen rain which fall in showers from cumulonimbus clouds.
rain gauge a device for collecting and measuring the amount of rain which falls.
global winds winds that are high up in the atmosphere
prevailing westerlies global winds that affect our weather in the united states
sea breeze a local wind that blows from the sea to the land
land breeze a local wind that blows from the land to the sea
anemometer measures wind speed
wind vane measures wind direction
jet stream a river of air in the atmosphere
cold front The forward edge of an advancing mass of cold air that pushes under a mass of warm air
warm front forms when a relatively moist, warm air mass slides up and over a cold air mass
atmosphere The envelope of gasses surrounding the earth
precipitation water that falls to the Earth’s surface as rain, snow, sleet, or hail.
evaporation the process of changing from a liquid to a gas
gulf stream a warm current that starts near the equator and moves from Florida all the way to Iceland
air mass a large “bubble” of air that has about the same temperature and humidity throughout it
la Nina/ el nino unusual warming or cooling of the seawater in the Pacific Ocean
temperature the average speed of the particles in a substance
humidity water vapor in the air
thermometer a tool that measures temperature
barometer a weather instrument that measures air pressure
front a place where one air mass meets and pushes aside another air mass
hurricane a very large and violent tropical storm
Created by: 5189496414
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