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7 Cards in this Set
- Front
- Back
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How is coal used in the United States? |
to heat homes, to produce electricity, to manufacture iron and steel |
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What is oil called wen it is in its natural state? |
crude oil or petroleum |
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How is the water heated in a hot spring? |
by the extremely hot rock upon which it rests |
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In what kind of rock are most caves found? |
limestone |
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What is the name for a spring of hot water that spurts from the earth? |
geyser |
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rock formation that holds on tightly to the ceiling |
stalactities |
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rock formation that grows up from the ground |
stalagmites |
