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Chapter 10

Concept #3 Quiz

Concept #3 Quiz
Choose the best possible answer to the following questions about Key Concept 3 "Storage and movement of groundwater."

This activity contains 9 questions.

	Which of the following best describes an aquifer?   a layer or stratum in which groundwater flows downward to the water table the porous and permeable, saturated cone of depression in an aquitard a saturated, porous and permeable layer or stratum an unsaturated, losing stream bed or stratum below a spring

	Which of the following is NOT a factor when considering “pore space” in a rock?   degree of sorting of the grains hardness and cleavage of the grains amount of cementing material between grains how the grains are packed together size and shape of the grains

	Permeability is determined by ___________.   the size of the rocks connectivity of pores in rocks how many pores are in the rocks none of these

	Match the following terms with the appropriate description: Using the pull-down menus, match each item in the left column to the corresponding item in the right column. the percentage of the total volume of rock/sediment that consists of voids layers of rock/sediment allow easier groundwater flow layers of rock/sediment that hinder groundwater flow the ability of a material to transmit a fluid opening similar to those in a sponge 4.1 aquifer A B C D E 4.2 aquitard A B C D E 4.3 permeability A B C D E 4.4 porosity A B C D E 4.5 pore space A B C D E

	Which of the following situations would be the best aquifer?   low permeability and high potability high porosity and low permeability low porosity and low permeability high porosity and high permeability

	Match the term with the best-suited material that would form it: Using the pull-down menus, match each item in the left column to the corresponding item in the right column. well-connected voids that are saturated with water well-connected voids poorly-connected voids that may be saturated with water well-sorted sand grains 6.1 aquifer A B C D 6.2 aquitard A B C D 6.3 high permeability A B C D 6.4 large pore spaces A B C D

	Subsurface rocks that serve as aquifers usually have __________.   higher porosity connected pore spaces between grains high fracture density (many fractures) any of these

	Which rock type(s) make(s) good "aquitards”?   a. fractured igneous rocks and sandstones b. unfractured metamorphic and igneous rocks c. unfractured metamorphic rocks and shale only b. and c.

	In tracking groundwater movement, the motion is in upward curves into streams (see diagram below). If the motion of groundwater is due to gravity, why do these upward-curved motions occur?   The motion is caused by the higher pressure exerted on the groundwater by the weight of water in the stream, so the water moves to lower pressure on the slopes on either side of the stream. The motion is caused by the fact that streams suck water into their channels, so gravity pulls the water down, but streams suck it upward to create higher stream flows. The motion is a compromise between gravity pulling the water downward, and the tendency for the water to move to lower pressure in the stream. The motion is a compromise between gravity pulling water out of streams, and the tendency for the water to move to lower pressure on the hillside.

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