The Nitrogen Cycle and Tank Stewardship

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Across
  1. 5. the measurement of how acidic vs. alkaline a solution may be
  2. 6. the measurable level of heat energy in a substance
  3. 8. a less toxic nutrient of the N cycle that is converted from Ammonia
  4. 9. a phase of the Nitrogen (N) cycle when the least toxic form of nitrogen develops in an aquarium
  5. 11. the measurable amount of space a substance occupies or 'takes up'
  6. 14. a species of bacteria that helps cycle nitrogen
  7. 16. a sequence of steps that usually yield some result
  8. 17. the act of taking care of a common resource
  9. 18. when a substance has not formed ions
  10. 20. the condition of being harmful to life in an ecosystem
  11. 21. the measurable area on a particular surface
Down
  1. 1. an important element in ecosystems that allows for respiration and consumption by organisms alike
  2. 2. an important limiting nutrient that cycles in ecosystems
  3. 3. a species of bacteria that helps cycle nitrogen
  4. 4. bacteria that help cycle nitrogen in an aquarium
  5. 5. an important step of a process being studied
  6. 7. a measurement of the ratio between molecules in a solution to determine a particular water quality
  7. 10. when an atom gets a charge when there is a change in the number of its electrons
  8. 12. a chemical that provides energy to an organism when consumed
  9. 13. a substance that has no particular use and is more costly than it is beneficial (opposite of resource)
  10. 15. something that is beneficial to a group or individual
  11. 19. the act of replacing toxic water in an aquarium