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Science 3

Weather and Climate

TermDefinition
troposphere the lowest layer of the atmosphere where most water is found and most clouds form.
thermometer a tool used to measure temperature
barometer an instrument that is used to measure air pressure and predict changes in the weather.
rain gauge an instrument for measuring rainfall.
hygrometer an instrument for measuring the amount of moisture in the air.
wind vane a weather instrument used to determine the direction the wind is blowing
anemometer an instrument for measuring the force or speed of the wind.
high-pressure area a mass of cold air
low-pressure area a mass of warm air
water vapor gas or moisture floating in the air; steam
fog fine particles of water floating in the atmosphere near the ground
meterologist a person who studies, reports and forecasts weather conditions
updrafts an upward current of warm, moist air
wind the horizontal movement of air
atmosphere the layer of air that surrounds earth.
air pressure the weight of air
humidity a measure of the amount of water in the air
precipitation any form of water that falls from clouds, such as rain or snow.
evaporation the process by which a liquid changes into a gas
condensation the process by which a gas changes back into a liquid
local winds the winds dependent upon local changes in temperature
prevailing winds the global winds that blow constantly from the same direction
airmass a large body of air that has nearly the same temperature and humidity through out
front the boundary between air masses
climate the average of all weather conditions through all season over a period of time.
microclimate the climate of a very small area
El Nino a short term climate change that occurs every two to ten years
greenhouse effect process by which the earths atmosphere absorbs heat
global warming the hypothesized rise in earths average temperature from excess carbon dioxide
Created by: JerrodM
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