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After ice sheets and glaciers, ________ contain(s) the next highest percentage of the Earth's freshwater.


Which common, rock-forming mineral or mineral group is most readily dissolved by groundwater?


A stream is said to be perennial and effluent when ________.

the local water table is above the channel bottom year round

The water table is ________.

a boundary between saturated rock below and unsaturated rock above

________ controls the ease (or difficulty) of groundwater transmission through a porous material.


________ are characteristics found in all good aquifers.

High porosity and high permeability

A perched water table develops when ________.

a horizontal aquitard above the regional water table lies below an aquifer

An artesian well is one in which ________.

water rises above the top of the aquifer without any pumping

A ________ is the icicle-like speleothem that grows down from the roof of a cavern.


________ are specific features of karst topography.

Streams flowing into depressions and continuing underground

The hot spring deposits at Mammoth Hot Springs, Yellowstone National Park, are travertine. What rock probably lies somewhere beneath the hot springs?


What force pushes groundwater from pore to pore below the water table?

pressure gradient or hydraulic gradient

A disappearing (sinking) creek is ________.

an influent stream in a karst area

Which one of the following concerning stalactites and stalagmites is not true?

Stalagmites form on the floors of caves below the water table.

The aerated zone ________.

lies above the water table

________ is the volume of voids or open space in a rock or unconsolidated material.


The term karst topography was first used in ________.

the Republic of Slovenia, a province of the former Yugoslavia

An unconfined water table is the ________.

boundary between the aerated zone above and saturated zone below

Which of the following best describes how geysers erupt?

With a slight reduction in pressure, water in a saturated, natural conduit suddenly boils, sending a plume of steam and hot water into the air above the vent.

Where are the most extensive geothermal features in the world?

Yellowstone National Park, U. S

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