Earth
What is the name of the single continent that existed early in Earth's history?
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What event happened when water droplets were on a spider's web but it hadn't rained?
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From where does 90% of the water vapor in the air come?
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Broken river ice stuck in a narrow channel causes what?
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What is the most photographed, painted, and scaled mountain in the world?
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Which of the following describes a period of abnormally dry weather for a specific area?
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