Earth

What is another name for permanently frozen ground?

More Questions from Earth
Which of the following is a model of the earth?
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If you are going to Florida Bay from the everglades which direction would you travel?
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From where does 90% of the water vapor in the air come?
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Which unit measures atmospheric pressure?
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What was the Great Plains of the U.S. called in the 1930's because of erosion?
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What is the hottest place on earth?
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What is the study of atmospheric conditions and climate called?
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A 286-mph tornado ripped through what U.S. state?
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