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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 absorbs some of the sun's ultraviolet rays, thereby reducing the amount of potentially harmful radiation that reaches the earth's surface.
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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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