Earth

John Glenn first orbited the earth in what year?

More Questions from Earth
What soft brown coal that has lost all of its moisture called?
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About 100 lightning bolts strike the earth how often?
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What is the repeating cycle of precipitation, condensation and evaporation called?
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What instrument measures altitude?
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Weather radar that measures direction and speed of a moving object best fits which science term?
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A scientist that studies the Earth's surface is called what?
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What were water mills used for in the 1700's in Europe?
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What is water treated with to prevent bacteria from growing?
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