Vocab
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| Capillary Action | The combined force of attraction among water molecules and with the molecules of surrounding materials.
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| Polar Molecule | A molecule that has electrically charged areas.
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| Surface Tension | The tightness across the surface of water that is caused by the polar molecules pulling on one another.
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| Specific Heat | The amount of heat needed to increase the temperature of a certain mass of substance by 1*C
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| Groundwater | Water that fills the cracks and spaces in underground soil and rock layers
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| Tributary | A smaller stream or river that feeds into a main river
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| Watershed | The land area that supplies water to a river stream.
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| Acid Rain | Rain or another form of precipitation that is more acidic than normal caused by the release of molecules of sulfur dioxide and nitrogen oxide into the air.
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| Non-polar Molecule | Term applied to hydrophobic (Water-fearing) molecules that cannot bond with water.
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| Reservoir | A lake that stores water for human use
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| Eutrophication | The process by which nutrients in a lake build up over time causing an increase in the growth of algae.
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| Permeable | Characteristic of material that is full of tiny connected air spaces that water can seep through.
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| Impermeable | A characteristic of materials such as clay and granite through which water does not easily pass
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| Saturated Zone | A layer of permeable rock or soil in which the cracks and pores are totally filled with water
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| Unsaturated Zone | A layer of rocks and soil above the water table in which the pores the pores contain air as well
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| Water Table | The top of the saturated zone or depth to the groundwater under Earth's surface.
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| Cohesion | The sticking together of particles of the same substance
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| Aquitard | a low permeability geologic formation within a stratigraphic sequence that functions as the upper or lower boundary of a groundwater flow system or aquifer.
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| Aquifer | An underground layer of rock or soil that holds water.
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| Conservation | The practice using less of a resource so that it will not be used up.
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| Water Quality | The degree of purity water, determined by measuring the substances in water besides water molecules.
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| Pollutant | A substance that causes pollution.
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| Point Source | A specific source of pollution that can be identified.
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| Non-point Source | A widely spread source of pollution that is difficult to link to a specific point of origin.
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| Pesticide | A chemical intended to kill insects and other organisms that damage crops.
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| Adhesion | The action or process of adhering to a surface or object.
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