chapter 6 vocabulary

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Across
  1. 1. number and variety of living things in an environment
  2. 4. oxygen— oxygen gas absorbed by and mixed into water
  3. 9. island— a long narrow island of sand that runs parallel to the mainland
  4. 11. a partly enclosed body of water along the coast where one or more streams or rivers enter and mix freshwater with saltwater
  5. 12. water— water that has more salinity than freshwater, but not as much as saltwater; often a result of mixing of freshwater and saltwater in estuaries
  6. 16. a low lying area where the soil is saturated with water at least seasonally, and supports plants adapted to saturated soils
  7. 17. the natural environment in which an organism normally lives, including the surroundings and other physical conditions needed to sustain it
  8. 21. impound reservoirs created in river valleys by placement of a dam across the river
  9. 23. of or having to do with life or living organisms; organic
  10. 24. water that is so full of small particles, such as silt, that the water is no longer transparent but instead appears cloudy
  11. 25. a chemical that an organism needs to live and grow that is taken from the environment; it can be an organic or inorganic compound
  12. 26. an artificial or natural lake built by placing a dam across a stream or river and used to store and often regulate discharge of water; underground storage area of water, such as in an aquifer
  13. 28. oxygen— oxygen gas absorbed by and mixed into water
  14. 32. study of the relationships living organisms have with each other and with their environment
  15. 33. a chemical that an organism needs to live and grow that is taken from the environment; it can be an organic or inorganic compound
  16. 34. water with about 3.5% salt content; ocean water or seawater
Down
  1. 2. matter— material that comes from plants or animals either dead or alive that is capable of decay; important in the transfer of nutrients from land to water
  2. 3. aquatic invertebrates with exoskeletons used as food, including various species of mollusks and crustaceans, such as crabs, shrimp, clams, and oysters
  3. 5. a wetland dominated by reeds and other grass-like plants
  4. 6. resource— something that is found in nature that is useful to humans
  5. 7. a wetland in which trees or woody shrubs predominate
  6. 8. zone— an area in which the water contains low or no dissolved oxygen causing a condition known as hypoxia
  7. 10. water that soaks into and refills an aquifer
  8. 13. nonliving; not derived from living organisms; inorganic
  9. 14. community, benthos— the community of organisms that live on or in the floor of a body of water, including rivers, lakes, estuaries, and oceans
  10. 15. a body of water partially enclosed by land that is directly open or connected to the ocean
  11. 18. a body of standing water small enough that sunlight can reach the bottom across the entire diameter
  12. 19. submerged rooted aquatic plants that tolerate salinity
  13. 20. bank- the shoulder like sides of the stream channel from the water’s edge to the higher ground nearby
  14. 22. a barrier or structure, natural or made by humans or animals, that is places across a stream or river to hold water back from flowing downstream
  15. 27. silt, sand, rocks and other matter carried and deposited by moving water
  16. 29. a large body of standing water
  17. 30. water with a salt content lower than about 0.05%; for comparison, sea water has a salt content of about 3.5%
  18. 31. a group of plants and animals living and interacting with one another in a particular place