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The sun heats parts of the earth _______ than others.
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more
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The sun heats the earth through a method known as ______________.
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radiation
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The Northern Hemisphere is tilted directly toward the sun on ____ ___. This is called the ________ _________.
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June 21 summer solstice
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Between 30 degrees nnorth and south latitude and the equator, the movement of air toward the equator is called _______ _______.
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trade winds
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Converging trade winds can cause an area of calm winds. This area of calm is called the ___________.
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doldrums
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_____________ ____________ in the Northern Hemisphere are responsible for many of the weather movements across the US and Canada.
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Prevailing Westerlies
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Winds at about 60 degrees latitude result from the air over the poles cooling, sinking and spreading out. This area of winds is called the _____________ ____________.
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polar easterlies
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The _____ ______ is wind that usually crosses the US at 30,000-35,000 feet and generally moves in a west to east direction.
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jet stream
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______ is a body of air in motion.
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wind
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______ ________ is defined as the direction from which the wind is blowing.
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wind direction
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A knot equals _____ mph.
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1.1
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A scale for estimating winds on either land or sea is called the _______ _______.
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Beaufort Scale
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To determine ______ ______ you use temperature and wind speed to explain how cold it feels.
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wind chill
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Airplanes takeoff _____ the wind because the wind gives the plane more lift.
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into
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A strong tailwind will _________ a plane¡¦s air speed.
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increase
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A ____________ is defined as a downdraft or downburst of wind.
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microburst
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______ is the total energy of all molecules within a substance.
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heat
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_____________ is a measure of molecular motion expressed on a man-made scale.
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temperature
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Warmer temperatures require __________ runways for takeoff.
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longer
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The weight or push on the Earth¡¦s surface is called _______ ________.
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atmospheric pressure
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Scientists and meteorologists mainly use a ___________ barometer.
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mercury
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A ________ ________ is found in weather stations and gives a permanent record of pressure readings.
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aneroid barometer
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________ is the most important element in the development of weather.
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moisture
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When a parcel of air is holding all of the water it can, ________ is reached.
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saturation
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The temperature at which the air becomes saturated is called the _________.
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dew point
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Converting water vapor to a liquid is called _____________.
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condensation
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Clouds and fog are products of ______________.
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condensation
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______ is composed of tiny droplets of liquid water in contact with the surface. It is actually a cloud that is touching the ground.
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fog
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______ is a fair weather cloud indicating good weather.
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cumulus
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_______ has a very uniform appearance with very little vertical development.
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stratus
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______ clouds are white, thin, wispy clouds, usually in patches, filaments, hooks or bands and are mainly composed of ice crystals.
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cirrus
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________ is heavier and darker than stratus and produces rain that can last for hours.
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nimbostratus
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_______ is the cloud that produces thunderstorms with thunder and lightning.
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cumulonimbus
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The cumulonimbus _________ occurs at the base of the cloud and looks like bulges or pouches.
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mammatus
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________ is the unrest or disturbance of the air and refers to its instability.
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turbulence
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Many types of ______ clouds are associated with turbulence.
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cumulus
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__________ is the general term given to the various types of condensed water vapor that fall to the Earth¡¦s surface, such as rain or snow.
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precipitation
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Rain that freezes on contact with the ground or highway is called ___ _____.
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freezing rain
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An ____ _____ is a huge body of air, usually 1,000 miles or more across that has the same temperature and moisture characteristics.
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air mass
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Air masses are identified by a two-letter code consisting of a _____ letter and a _________ letter.
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capital lowercase
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A boundary between two air masses is called a _________.
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front
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A ______ _______ occurs when warm air moves into an area of colder air and they collide.
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warm front
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A ______ ______ occurs when the air moving into the area is colder than the already present warmer air.
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cold front
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When air masses bump against each other, but not strong enough to force movement, it is called a ____________ _______.
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stationary front
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When three differing air masses are involved with each other, it is called an ______________.
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occluded front
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________ come from cumulonimbus clouds and always possess thunder and lightning.
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thunderstorms
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The ___________ stage of a thunderstorm is dominated by updrafts.
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building
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_________ is the most dangerous part of a thunderstorm.
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lightning
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A tornado¡¦s _______ are the main reason for the tremendous destruction associated with tornadoes.
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winds
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If a tornado is coming and time permits, get to a ___________ or underground.
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Basement
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