QUIZ 7 2
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- The largest reservoir of water on Earth is:
- The ocean
- The conditions necessary for cave formation exist at countless places on the Earth, yet caves are a relatively rare phenomenon. Which of the following conditions is MOST necessary for cave formation?
- Presence of a soluble rock type.
- Storage of high-level nuclear wastes requires that all of the following conditions exist at the proposed site, EXCEPT:
- Burial within the saturated zone.
- Gaining streams are those where:
- Water from the saturated zone flows into the stream.
- Porosity is:
- The percentage of a rock's volume that is open space
- Groundwater flows:
- From areas of high hydraulic head to areas of low hydraulic head.
- An aquifer is
- A body of saturated rock or sediment through which water can move easily
- Permeability is:
- The capacity of a rock to transmit fluids.
- Caves and cavern systems are formed by:
- Groundwater dissolving limestone and dolomite
- The amount of void space in a sample of fractured limestone is 312 cubic centimenters. The volume of the sample is 2000 cubic centimeters; thus the porosity of the limestone is
- 15.6%
- An artesian well is one:
- That rises above the surface of the aquifer without pumping.
- The top of the water saturated zone is known as:
- The water table
- Geysers and hot springs
- Are caused by groundwater being geothermally heated
- Spring water flowing from an unconfined aquifer on a hillside is:
- Likely to be contaminated.
- An example of a rock that may have high porosity but essentially zero permeability is
- Pumice.
- The near-surface zone where all pores are filled with water is called:
- The saturated zone
- A spring forms:
- Where the water table intersects the land surface
- Which rock type below is likely to possess the highest permeability?
- Sandstone.
- The decline in the level of the water table around a pumping well is known as:
- The cone of depression