Science Crossword : 2nd Period

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Across
  1. 1. Features of the environment that are alive, or once alive
  2. 3. A biological community of interacting organisms and their physical environment
  3. 4. Physical rather than not derived from living organisms
  4. 5. A system of interlocking and interdependent food chains
  5. 6. Area's average weather conditions over time, including temperature, rainfall or other precipitation, and wind
  6. 7. Process of changing from a gas to a liquid
  7. 8. The chemical processes by which atmosphere nitrogen is assimilated into organic compounds especially by certain microorganisms as part of the nitrogen cycle
  8. 9. Air that surrounds Earth
  9. 10. The series of processes by which nitrogen and its compounds are interconverted in the environment and in living organisms, including nitrogen fixation and decomposition
  10. 12. The regions of the surface, atmosphere, and hydrosphere, of the earth occupied by living organisms
  11. 16. How molecules move between the living and nonliving world
Down
  1. 2. A group of people living in the same place or having a particular characteristic in common
  2. 3. The changing of liquid into a gas
  3. 7. The production of energy rich nutrient molecules from chemicals
  4. 11. Shows the amount of energy available at each feeding level in an ecosystem
  5. 13. A mixture of organic remains, clay, and rock particles
  6. 14. The cycle of processes by which water circulates between the earth's oceans, atmosphere, and land, involving precipitation
  7. 15. The branch of biology that deals with the relations of organisms to one another and to their physical surroundings