Earth

What are mounds of sand that have been windblown called?

More Questions from Earth
What imaginary line divides the Earth's northern and southern hemispheres?
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What type of power did the ancient Persians use to grind grains?
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What water movement is similar to a jet stream in the air?
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What season has the warmest weather in the U.S.?
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A line of equal or constant air temperature is what?
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What is petroleum as found in the earth, before it is refined?
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From where does 90% of the water vapor in the air come?
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What is in the sky if it is overcast?
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