Earth
What are the broken-off pieces of glaciers that make it to the open sea called?
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What substance can layers of decayed plants form over time?
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How many days does it take for the Earth to revolve around the sun?
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Which body part is also a name for the center of a hurricane?
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On October 11, 1999 the world population hit a milestone of how many?
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What was the name of the August 2005 hurricane that damaged New Orleans?
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What is a person called who specializes in the physical structure and process of the earth?
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Which word means to "filter down through the soil horizons"?
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What type of glacier is Greenland or Antarctica called?
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What type of satellites are always in the same spot in Earth's orbit?
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What acidic precipitation occurs when sulfur dioxides build up in the clouds?
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In weather terms, what turns to water in a "spring thaw"?
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