Most Caves Probably Are Formed by Ground Water Circulating ___

Q15: A _ is a deep, cylindrical hole

Q16: _ is the percentage of a rock

Q23: _ is becoming a serious problem as

Q37: _ are closed depressions found where land

Q48: An unconfined aquifer is recharged rapidly, whereas

Q52: Gasoline leaked from gas station storage tanks

Q53: Groundwater is important in the preservation of

Q57: Deposits of calcite built up in caves

Q59: In a(an)_ aquifer water rises above the

Q60: The hydraulic head is defined as _.<br>A)