Baltimore Watershed Review

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Across
  1. 3. tension the “skin” on the top of water that lets some bugs walk on it
  2. 9. all the members of one species living in one place
  3. 12. living things in nature, like trees, bugs, and people
  4. 14. growth when a population grows faster and faster
  5. 16. food-like substances that plants and animals need to live and grow
  6. 17. oxygen oxygen mixed in water that fish and other animals need
  7. 18. all the different species living together in one place
  8. 19. bonds weak connections between water molecules that make water special
  9. 20. a type of nutrient plants need, but too much can harm water
  10. 22. growth when the number of individuals in a group goes up
Down
  1. 1. when liquid water changes into gas and goes into the air
  2. 2. too many nutrients in water that cause too much algae
  3. 4. living and nonliving things that interact in one area
  4. 5. zones parts of water with little or no oxygen, where animals can’t live
  5. 6. a group of the same kind of living thing, like all lions
  6. 7. when one end of a molecule is slightly positive and the other is negative
  7. 8. Algal Bloom when algae grow too much and hurt other life in water
  8. 10. a number that shows if something is acidic, basic, or neutral
  9. 11. how clear or cloudy water looks
  10. 13. water that flows over land and carries dirt or pollution into rivers or lakes
  11. 15. factor something that keeps a population from growing too big
  12. 18. capacity the biggest number of organisms an area can support
  13. 21. nonliving things in nature, like sunlight, rocks, or air