Earth
What causes the sound in a seashell?
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What type of speleothems found in limestone caves grow upward from the floor?
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What two countries lie on opposite sides of the Juan de Fuca Strait?
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What was the name of the August 2005 hurricane that damaged New Orleans?
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What type of clouds are thick and puffy and can sometimes turn into thunderstorms?
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What is the weather phenomenon known as a "tsunami"?
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