Over 68 percent of the fresh water on Earth is found in icecaps and glaciers, and just over 30 percent is found in ground water. Only about 0.3 percent of our fresh water is found in the surface water of lakes, rivers, and swamps.
mastering geology chapter 17 groundwater Flashcards | Quizlet
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Where does the majority of liquid freshwater on Earth exist?
And, of the total freshwater, over 68 percent is locked up in ice and glaciers. Another 30 percent of freshwater is in the ground. Fresh surface-water sources, such as rivers and lakes, only constitute about 22,300 cubic miles (93,100 cubic kilometers), which is about 1/150th of one percent of total water.
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Where is most of Earth’s freshwater quizlet?
Terms in this set (18) Most of Earth’s freshwater is stored in ice caps and glaciers.
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How does most groundwater move in the subsurface?
It’s more like water in a sponge. Gravity and pressure move water downward and sideways underground through spaces between rocks. Eventually it emerges back to the land surface, into rivers, and into the oceans to keep the water cycle going.
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Which aquifer would be most effective in purifying polluted groundwater?
An aquifer composed of fine sand would be the most effective in purifying polluted water, since its tight pore space would be capable of trapping the most contaminants.
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How does most groundwater move in the subsurface quizlet?
Pulled by gravity, groundwater seeps from the surface slowly downward through aquifers in the earth’s subsurface and eventually discharges into lakes, rivers, and the coastal ocean.
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How does groundwater flow in the subsurface?
In the water cycle, when precipitation falls on the earth’s land, some of the water flows on the surface forming streams and rivers. The remaining water, through infiltration, penetrates the soil traveling underground, hydrating the vadose zone soil, recharging aquifers, with the excess flowing in subsurface runoff.
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What is groundwater How does it move?
Groundwater is water that exists in the pore spaces and fractures in rock and sediment beneath the Earth’s surface. It originates as rainfall or snow, and then moves through the soil into the groundwater system, where it eventually makes its way back to surface streams, lakes, or oceans.
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How does water move between the surface and subsurface?
Infiltration and percolation Water infiltrates the soil by moving through the surface. Percolation is the movement of water through the soil itself. Finally, as the water percolates into the deeper layers of the soil, it reaches ground water, which is water below the surface.
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Where is most of Earth’s freshwater?
And, of the total freshwater, over 68 percent is locked up in ice and glaciers. Another 30 percent of freshwater is in the ground. Fresh surface-water sources, such as rivers and lakes, only constitute about 22,300 cubic miles (93,100 cubic kilometers), which is about 1/150th of one percent of total water.
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Where is most of Earth’s freshwater located Quizizz?
Most of Earth’s freshwater is stored in ice caps and glaciers. Where is most of the freshwater found on Earth?
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Which aquifer listed below would be the most effective in purifying polluted groundwater?
Which aquifer listed below would be the most effective in purifying polluted groundwater, and why? permeable sandstone; the pores between grains are large enough to let water through but small enough to block contaminants.
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Are unconfined aquifers more polluted?
Unconfined aquifers generally are much more vulnerable to contamination than confined aquifers. For a well in a confined aquifer, the farther the well is from the unconfined area, the less vulnerable it is to contamination. Generally, the deeper the well, the less vulnerable it is to contamination.
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What would make the most effective aquifer?
An aquifer is defined as a body of rock or unconsolidated sediment that has sufficient permeability to allow water to flow through it. Unconsolidated materials like gravel, sand, and even silt make relatively good aquifers, as do rocks like sandstone. Other rocks can be good aquifers if they are well fractured.
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What aquifer is most easily polluted?
Unconfined sand and gravel aquifers are more vulnerable to contamination.
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