6th Science Water Unit Vocab

  1. erosion
    the process by which fragments of soil and rock are broken off from the ground surface and carried away
  2. water table
    the top of the saturated zone, or depth to the groundwater in an aquifer
  3. watershed
    the land area that supplies water to a river system
  4. eutrophication
    the process by which nutrients in a lake build up over time, causing an increase in the growth of algae
  5. point source
    a specific source of pollution that can be identified, such as a pipe
  6. permeable
    characteristics of materials that allow water to easily pass through them, such as sand and gravel
  7. ppm
    (parts per million) a measurement of the concentration of a substance in water or soil. One ppm is roughly equal to 5 liters of a substance in an Olympic-sized swimming pool
  8. ppb
    (parts per billion) a measurement of the concentration of a substance in water or soil. One ppb is roughly equal to a teaspoon of a substance in an Olympic-sized swimming pool
  9. plume
    an area of contamination
  10. runoff
    water that flows over the ground surface rather than soaking into the ground
  11. threshold limit
    the boundary where the concentration of pollution is unsafe for people
  12. impermeable
    characteristics of materials through which water does not easily pass, such as clay and granite
  13. water pollution
    the addition of any substance that has a negative effect on water or the living things that depend on it
  14. nonpoint source
    a widely spread source of pollution that is difficult to link to a specific point of origin, such as road runoff
  15. concentration
    the amount of one substance in a certain volume of another substance
  16. aquifer
    an underground layer of rock or soil that holds water
  17. wetland
    an area of land that is covered with a shallow layer of water during some or all of the year
  18. Maximum Contaminant Level (MCL)
    standards set by the US Environmental Protection Agency (EPA) for drinking water quality. A MCL is the legal threshold limit on the amount of a hazardous substance that is allowed in drinker water under the Safe Drinking Water Act.
  19. Pores
    tiny openings in and between particles of rock and soil which may contain air or water
  20. groundwater
    water that fills the cracks and pores in the underground soil and rock layers
Card Set
6th Science Water Unit Vocab
Flashcards for Mrs. Williams's water unit