Earth

What is petroleum as found in the earth, before it is refined?

More Questions from Earth
What type of topography describes caves, caverns, and sinkholes?
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What is the opening that spews out lava called?
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What is the process that removes salt from sea water?
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How was the 12-mile limit of a country's boundary set?
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How are pockets of air in soil made?
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Earth's crust is made of many pieces called ______ plates.
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What are the seasonal rains that occur in southeast Asia called?
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What kind of rain is bad for the environment?
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