Cycles in Living Things Crossword Puzzle

Edit Answers
12345678910111213141516171819202122
Across
  1. 4. An organism capable of synthesizing its own food from inorganic substances using light or chemical energy.
  2. 9. An autotrophic organism that serves as a source of food for other organisms in a food chain.
  3. 10. A nonmetallic element that constitutes nearly four-fifths of the air by volume, occurring as a colorless, odorless, almost inert diatomic gas, N2.
  4. 11. What gives leafy greens and blue green algae their green color.
  5. 14. The process by which a green plant turns water and carbon dioxide into food when the plant is exposed to light.
  6. 16. Process by which free nitrogen (N2) is extracted from the atmosphere and converted (fixed) into nitrogen compounds which are plant nutrients (fertilizer).
  7. 18. The process in which energy is emitted as particles or waves.
  8. 19. The protection of plants, animals, and natural areas from the damaging effects of human activity.
  9. 20. Living or occurring only in the presence of free oxygen.
  10. 21. A colorless syrupy organic acid formed in sour milk and produced in the muscle tissues during strenuous exercise.
  11. 22. Anything that is produced, whether as the result of generation, growth, labor, or thought, or by the operation of involuntary causes.
Down
  1. 1. Any substance whose presence in plant or animal tissues produces a characteristic color.
  2. 2. An organism, usually a bacterium or fungus, that breaks down the cells of dead plants and animals into simpler substances.
  3. 3. A single-celled fungus that ferments sugar to produce alcohol and carbon dioxide.
  4. 5. The combined processes, including photosynthesis, decomposition, and respiration, by which carbon as a component of various compounds cycles between its major reservoirs—the atmosphere, oceans, and living organisms.
  5. 6. Living or occurring in the absence of free oxygen.
  6. 7. A heterotrophic organism that feeds on other organisms in a food chain.
  7. 8. The set of metabolic reactions and processes that take place in the cells of organisms to convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products.
  8. 12. A metabolic process that converts sugar to acids, gases or alcohol.
  9. 13. An organism that cannot manufacture its own food and instead obtains its food and energy by taking in organic substances, usually plant or animal matter.
  10. 15. An organelle in the cytoplasm of cells that functions in energy production.
  11. 17. A chemical substance that is present at the start of a chemical reaction.