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SS2: BIOLOGY - 2ND TERM

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  1. Mechanism of the Respiratory System | Week 1
    6 Topics
    |
    2 Quizzes
  2. Mechanism of Gaseous Exchange in Plants | Week 2
    1 Topic
    |
    1 Quiz
  3. Excretory Systems I | Week 3
    5 Topics
    |
    1 Quiz
  4. Excretory Systems II | Week 4
    4 Topics
    |
    3 Quizzes
  5. Nutrient Cycling in Nature I | Week 5
    3 Topics
  6. Nutrient Cycling in Nature II | Week 6
    2 Topics
    |
    1 Quiz
  7. Ecological Management | Week 7
    4 Topics
  8. Ecological Tolerance | Week 8
    2 Topics
    |
    1 Quiz
  9. Adaptation | Week 9
    3 Topics
    |
    1 Quiz
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Topic Content:

  • Process that Remove Oxygen from the Atmosphere
  • Process that Release Oxygen into the Atmosphere
  • Importance of Oxygen Cycling
  • Carbon – Oxygen Balance

The process by which oxygen is removed and returned to the atmosphere is referred to as the oxygen cycle.

Process that Remove Oxygen from the Atmosphere:

(i) Cellular Respiration: During respiration living things breathe in oxygen.

(ii) Combustion or Burning of Materials: This occurs when any organic materials, including fossil fuels, natural gas, plastics, and wood, are burned in the presence of oxygen and release carbon dioxide into the atmosphere.

 

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