A narrow band of strong air currents encircling the globe is called _____
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  • an airship draft
  • an aircraft flow
  • a jet stream
  • a plane current
Jet streams are caused by the _____
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  • even heating of the atmosphere
  • uneven heating of the atmosphere
  • even heating of the hydrosphere
  • uneven heating of the hydrosphere
How high are jet streams above the Earth's surface?
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  • about 1 kilometer
  • about 10 kilometers
  • about 100 kilometers
  • about 1000 kilometers
A body of air with the same temperature, humidity and pressure throughout is called _____
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  • a  cloud
  • a jet stream
  • an ocean current
  • an air mass
Moving air can affect _____
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  • the continents
  • the weather
  • the equator
  • the poles
Warm water is transported from the equator toward the poles by _____
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  • ocean currents
  • sea breezes
  • land breezes
  • the jet stream
Without jet streams and ocean currents a lot of the Earth would be _____
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  • incredibly hot all the time
  • unspeakably cold
  • uninhabitable
  • very pleasant
The British Isles are pretty far north, so we might expect them to have _____
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  • a cold climate
  • a hot climate
  • a dry climate
  • a wet climate
Which ocean current, in particular, helps keep the British Isles warm?
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  • the North Equatorial Current
  • the Labrador Current
  • the Gulf Stream
  • the South Equatorial Current
Which jet stream has the greatest effect on the British Isles?
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  • the tropical jet stream
  • the subtropical jet stream
  • the polar jet stream
  • the arctic jet stream
When the jet stream lifts closer to the north pole, the British Isles experience _____
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  • a cool and dry summer
  • a cool and wet summer
  • a hot and dry summer
  • a hot and wet summer
When the jet stream runs unusually far to the South, the British Isles experience _____
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  • a cool and dry summer
  • a cool and wet summer
  • a hot and dry summer
  • a hot and wet summer
The boundary separating two masses of air of different densities is called _____
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  • a clash
  • a battle
  • a front
  • a collision
When a mass of cold air moves into a mass of warm air, it's called _____
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  • a cold front
  • a warm front
  • a downward front
  • an upward front
When a mass of warm air moves into a mass of cold air, it's called _____
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  • a cold front
  • a warm front
  • a downward front
  • an upward front
Which front often brings heavy rains, hail, thunder, and lighting?
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  • a cold front
  • a warm front
  • a downward front
  • an upward front
Which front often brings clear weather, but some serious humidity?
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  • a cold front
  • a warm front
  • a downward front
  • an upward front
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