Earth

What reef is the largest living structure on Earth?

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What are large bodies of air with similar temperatures and moisture content called?
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What percentage of rock-forming minerals are silicates?
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What periods of the Earth's history had glaciers covering a lot of the Earth?
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What is the place where an air mass forms called?
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What is mining near the Earth's surface called?
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What is the best definition of the term "rock"?
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What happens to the pressure of water as depth under the water increases?
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What must happen for a tree to become a fossil?
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