Decomposition (T)

• What is the main topic of the video?

  Conditions required for decomposition.
• What are the conditions required for decomposition?

  • Temperature
  • Amount of water
  • Amount of oxygen
• What type of students is this video intended for?

  Triple biology students.
• What role do decomposing microorganisms play in the carbon cycle?

  They decompose waste materials and dead remains, returning carbon to the atmosphere.
• What do decomposers return to the soil?

  Mineral ions.
• What is the purpose of compost in gardening?

  • Natural fertilizer
  • Rich in minerals needed for plant growth
• How does temperature affect decomposition?

  Decomposition occurs faster at warmer temperatures.
• Why is it important that compost does not get too hot?

  It can denature enzymes and kill decomposers.
• How does moisture affect decomposing microorganisms?

  Moisture allows decomposing microorganisms to work faster.
• What is the role of oxygen in decomposition?

  Oxygen is required for aerobic respiration.
• How do gardeners ensure adequate oxygen supply in compost heaps?

  • Compost bins have holes for oxygen entry
  • Regular mixing with a gardening fork
• What happens during anaerobic decay?

  Anaerobic decay produces gases including methane, known as biogas.
• What are small-scale biogas generators used for?

  • Provide fuel for homes
  • Often use plant materials or animal manure
• Under what conditions do decomposers produce biogas?

  Anaerobic conditions.