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Water Systems
| Question | Answer |
|---|---|
| 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 |