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Science chp.5 for Mrs. Brown'science/ social studies

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 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 ; stream
Fog Fine particles of water floating in the astmosphere near the ground
Meteorologist A person who studies
Wind The horizontal movement of air
Updrafts An upward current of warm , moist 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 the clouds, such as rain or snow.
Evaporation The process by which a liquid change into gas
Condensation The process by which a gas changes back into liquid.
Local winds The winds dependent upon local changes in temperature.
Prevailing winds The global winds that blow constantly from the same direction.
Air mass A large body of air that has nearly the same temperature and humidity throughout.
Front The boundary between air masses
Climate The average of all weather condition all season over a period of time.
Microclimate The climate of a very small area.
El Niño A short-term climate change that occurs every two to ten years.
Greenhouse effect Process by which the Earth's atmosphere absorbs heat.
Global warming The hypothesized rise in Earth's average temperature from excess carbon dioxide.
Created by: emmagregory