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48 Cards in this Set
- Front
- Back
air pressure
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the weight of the air pressing down in one place.
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altitude
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the height from sea level
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anemometer
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a device to measure wind speed
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atmosphere
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the air surrounding the Earth
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barometer
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a device to measure air pressure
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Celsius
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a temperature scale where water freezes at zero degrees and boils at 100.
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cirrus
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Thin, wispy clouds which form at the upper layer of the atmosphere and are composed mostly of ice
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climate
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the average weather for a place.
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condensation
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the changing of a gas to a liquid.
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conduction
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heat energy transferred through a solid.
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convection
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heat energy transferred by liquid or gas.
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cumulus
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Puffy clouds, often described as "cottonballs".
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cumulonimbus
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a dark, tall cloud that produces thunderstorms
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cyclone
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An area of low pressure around which winds blow.
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density
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the amount of mass in a volume. A liter of oil has greater density than a liter of smoke.
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dew point
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the temperature at which condensation occurs.
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evaporation
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the process by which a liquid changes to a gas or vapor.
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fog
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A cloud at ground level.
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freezing rain
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precipitation that falls as rain and freezes when it hits the ground or other surfaces
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front
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the boundary between two different air masses.
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hail
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a precipitation of ice balls falling from a cumulonimbus cloud.
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humidity
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the amount of water vapor in the air.
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hurricane
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the name for a cyclone above the equator. Cyclones are known as typhoons below the equator.
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ionosphere
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the outer region of the Earth's atmosphere.
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mass
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the amount of matter in something
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mesosphere
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The layer of the atmosphere located between the stratosphere and the ionosphere, where temperatures drop rapidly with increasing height.
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meteorologist
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a person who studies weather.
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nimbus
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A type of cloud that produces rain.
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occluded front
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An area where warm air is pushed upwards as a cold front overtakes a warm front and pushes underneath it
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ozone layer
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"The protective layer in the atmosphere, about 15 miles above the ground, that
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precipitation
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the falling to earth of any form of water (rain or snow or hail or sleet or mist)
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psychometer
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a device to measure humidity
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radiation
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heat energy transferred by waves. Can occur in empty space.
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rain
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water falling in drops from vapor condensed in the atmosphere
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sleet
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Precipitation of small transparent ice pellets
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snow
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precipitation of ice crystals
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stationary front
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a front between warm and cold air masses that is moving very slowly or not at all.
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stratosphere
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region between the troposphere and mesosphere, extending from 10 to 30 miles above the Earth's surface.
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stratus
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Meaning "layer." A low, gray cloud layer with a rather uniform base whose precipitation is most commonly drizzle.
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temperature
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the average amount of molecule movement in a substance.
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thermometer
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a device to measure temperature
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thermosphere
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The outermost layer of the atmosphere, where gas molecules split apart into ions.
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tornado
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A violently rotating column of air that forms at the bottom of a cloud and touches the ground, and lasts less than one hour.
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troposphere
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The layer of the atmosphere closest to the earth's surface.
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volume
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an amount of space
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water vapor
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The colorless, odorless, invisible, gas form of water in the atmosphere.
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weather
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the condition of the troposphere at a given time.
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wind (or weather) vane
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a device to measure wind direction
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