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Water Systems
Question | Answer |
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Water Cycle | a continuous pattern in nature in which water moves as it changes state above, on, and below the surface of Earth |
Turbid | not clear; containing tiny specks of sediment or other solid matter |
Thermal Pollution | artificially raising the temperature (for example, of water) |
Melting | the change of state from a solid to a liquid; occurs when a solid gains thermal energy |
Sublimation | the change of state from a solid to a gas without first becoming a liquid; occurs when a solid gains thermal energy |
Evaporation | the change of state from a liquid to a gas; occurs when a liquid gains thermal energy |
Condensation | the change of state from a gas to a liquid; occurs when a gas loses thermal energy |
Deposition | the change of state from a gas to a solid; occurs when a gas loses thermal energy |
Freezing | the change of state from a liquid to a solid; occurs when a liquid loses thermal energy |
Runoff | water from precipitation and snowmelt that flows over Earth’s surface |
Groundwater | water that seeps through soil and cracks in rock; source of water for underground springs and wells |
Aquifer | a geological formation of loose rock or soil that is saturated with groundwater |
Water Table | the depth at which loose rock and soil below Earth’s surface are saturated with water; the upper boundary of an aquifer |
Precipitation | solid or liquid water that falls to Earth’s surface |
Polar Ice Sheet | a frozen field of ice covering either the North Pole or the South Pole |
Ice Cap | a large area of ice that permanently covers land |
Glacier | a river of ice, formed from snow accumulated over hundreds of years, that moves slowly downhill under the force of gravity |
Water Treatment | the process of removing potentially dangerous substances from water to make it more acceptable for a desired end-use |
Floc | sticky clumps formed from the reaction of alum in water, combined with sand and other waste solids |
Sustainability | being able to meet the needs of the present without compromising the ability of future generations to meet their own needs |
Salinity | a measure of the quantity of dissolved salt in water |
Concentration | a measure of the quantity of dissolved substance contained per unit volume of solution |
Desalination | the technology of removing salt and other minerals from water |
Contaminant | an undesirable substance in a mixture |
Fertilizer | a substance used to provide nutrients to plants, usually for the purpose of increasing crop production |
Herbicide | a chemical substance used to kill or slow the growth of certain plants; often used to kill weeds that compete with crop plants |
Pesticide | a chemical substance used to kill animal pests; often used to kill insects that damage crop plants |
Watershed | an area surrounded by high land and drained by a river and its tributaries; all runoff from within the watershed leaves the watershed at the same exit |
Bioremediation | the use of living things (micro-organisms, fungi, and green plants) to remove contaminants from a polluted environment |
Sewer System | a network of pipes that transports dirty or used water |
Blackwater | water that contains feces and urine; also called “sewage” |
Greywater | water that has been used for cooking, laundry, bathing, or similar tasks |
Wastewater | water that has been used or contaminated by human activity; blackwater and greywater |
Stormwater Runoff | water, usually from precipitation, that runs off roofs, lawns, and paved areas |