Earth Science Chapter 16 Vocabulary

17 terms by roblozia12

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weather

short term state of the atmosphere, incuding temperature, humidity, precipitation, wind and visibility

humidity

the amount of water vapor in the air

relative humidity

the ratio of the amount of water vapor in the air to the maximum amount of water vapor the air can hold at a set temperature

condensation

the change of state from a gas to a liquid

cloud

a collection of small water droplets or ice crystals suspended in the air, which forms when the air is cooled and condensation occurs

precipitation

any form of water that falls to the Earth's surface from the clouds

aire mass

a large body of air where temperature and moisture content are constant throughout

front

the boundary between air masses of different densities and usually different temperatures

cyclone

an area in the atmosphere that has lower pressure than the surrounding areas and has winds that spiral toward the center

anticyclone

the rotation of air around a high-pressure center in the direction opposite to Earth's rotation

lightning

an electric discharge that takes place between oppositely charged surfaces, such as between a cloud and the ground, between two clouds, or between two parts of the same cloud

thunder

the sound caused by the rapid expansion of air along an electrical strike

tornado

a destructive, rotating column of air that has very high wind speeds, is visible as a funnel-shaped cloud, and touches the ground

hurricane

a severe storm that develops over tropical oceans and whose strong winds of more than 120 km/h spiral in toward the intensely low-pressure storm center

thermometer

an instrument that measures and indicated temperature

barometer

an instrument tat measures atmospheric pressure

anemometer

an instrument used to measure wind speed

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