Decomposition

• What is meant by anaerobic decay?

  Decay that occurs without oxygen
• What role do decomposing microorganisms play in the carbon cycle?

  They decompose waste and return carbon to the atmosphere
• What do decomposers return to the soil?

  Mineral ions
• What is a compost heap and its purpose?

  • A compost heap is a pile of organic waste.
  • It decomposes plant material like grass.
  • Produces compost, a natural fertilizer.
  • Rich in minerals needed for plant growth.
• What are the optimal conditions for decomposition?

  Warm temperature, moisture, and oxygen supply
• How does temperature affect decomposition?

  Decomposition occurs faster at warmer temperatures
• Why do decomposers need moisture in the compost?

  Many chemical reactions in decay require water
• What happens if a compost heap dries out?

  Decomposition slows down significantly
• Why is oxygen important for decomposers?

  It is required for aerobic respiration
• How do gardeners ensure oxygen reaches the compost?

  By mixing the compost with a gardening fork
• What occurs in the absence of oxygen during decomposition?

  Anaerobic decay takes place
• What gases are produced during anaerobic decay?

  Methane and biogas
• What are biogas generators used for?

  • Provide fuel for homes.
  • Often use plant materials like food waste.
  • Can utilize animal manure.
• What do decomposers produce under anaerobic conditions?

  Biogas