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weather

what the air outside is like

weather pattern

a change in the weather that repeats

season

a time of year that has a certain kind of weather

winter

the coldest season

summer

the hottest season

fall

the season in which the air becomes cooler

spring

the season in which the air becomes warmer

temperature

how warm something is

thermometer

a weather instrument that measures the temperature of the air

wind

moving air

anemometer

a weather instrument that measures wind speed

precipitation

water that falls from the sky in one of 4 forms: rain, snow, sleet or hail

water cycle

the movement of water over and over, from Earth's surface, into the air, and then back to Earth's surface

evaporation

the process whereby sun heats water and changes the water into a gas, called water vapor

water vapor

the gas formed when water evaporates

condensation

the process whereby water vapor changes into tiny drops of water and forms a cloud

drought

a long period of time when it does not rain

flood

when it rains too much

weather vane

a weather instrument used to tell the direction of the wind

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