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7 Cards in this Set

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  • Back

How is coal used in the United States?

to heat homes, to produce electricity, to manufacture iron and steel

What is oil called wen it is in its natural state?

crude oil or petroleum

How is the water heated in a hot spring?

by the extremely hot rock upon which it rests

In what kind of rock are most caves found?

limestone

What is the name for a spring of hot water that spurts from the earth?

geyser

rock formation that holds on tightly to the ceiling

stalactities

rock formation that grows up from the ground

stalagmites