Quiz  /  Oxygen Cycle

  • 1. 
    Around how much of the human body is composed of oxygen?

  • 40%
  • 65%
  • 20%
  • 10%

  • 2. 
    What other element cycle is the oxygen cycle most interconnected with?

  • Carbon cycle
  • Nitrogen cycle
  • Water cycle
  • Food chain

  • 3. 
    Which of the following processes produces oxygen in the oxygen cycle?

  • Sunlight
  • Respiration
  • Oxidation
  • Decomposing

  • 4. 
    Which of the following processes uses oxygen through the burning of fuels like wood and coal?

  • Respiration
  • Decomposing
  • Oxidation
  • Combustion

  • 5. 
    Which of the following processes uses oxygen through the matter of dead plants and animals?

  • Decomposing
  • Respiration
  • Oxidation
  • Sunlight

  • 6. 
    Which of the following processes uses oxygen when things rust?

  • Respiration
  • Decomposing
  • Oxidation
  • Sunlight

  • 7. 
    Which of the following processes uses oxygen through the breathing of animals?

  • Respiration
  • Decomposing
  • Oxidation
  • Sunlight

  • 8. 
    In which of the following processes do plants produce oxygen from carbon dioxide, water, and sunlight?

  • Photosynthesis
  • Respiration
  • Decomposing
  • Oxidation

  • 9. 
    True or False: Unlike land animals, fish breath hydrogen and not oxygen.

  • TRUE
  • FALSE

  • 10. 
    What tiny plants live near the surface of the ocean and produce lots of oxygen?

  • Rainforests
  • Coral
  • Seaweed
  • Phytoplankton
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