Earth

What is the hard, dark substance found in the ground that is mined for fuel?

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What is the opening that spews out lava called?
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What region surrounds the North Pole?
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What is the wearing away of parts of the Earth by water or wind called?
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Which of the world's oceans is larger than all of the Earth's land area combined?
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What produces more energy than all the world's nuclear weapons combined?
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What molecules in fossil fuels are made from carbon and hydrogen?
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Which of these is not a metamorphic rock?
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What weather-related season is between June 1 and November 30 in North America?
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