Limiting Factors

• What is the main goal of the video?

  To interpret graphs to determine the limiting factor in photosynthesis and explain how greenhouses increase the rate of photosynthesis.
• What are the factors that can limit photosynthesis?

  • Light intensity
  • Carbon dioxide concentration
  • Temperature
  • Amount of chlorophyll in the leaves
• What is the equation for photosynthesis?

  Carbon dioxide + water → glucose + oxygen
• How does light intensity affect the rate of photosynthesis?

  It increases the rate of photosynthesis until it is no longer the limiting factor.
• What happens to the rate of photosynthesis when light intensity is increased beyond a certain point?

  The rate of photosynthesis stops increasing.
• What can be done to change the limiting factors of photosynthesis?

  Temperature and carbon dioxide concentration can be changed.
• How does increasing carbon dioxide concentration affect photosynthesis?

  It increases the rate of photosynthesis until it is no longer the limiting factor.
• What occurs if carbon dioxide concentration is increased beyond a certain level?

  The rate of photosynthesis does not change.
• What effect does temperature have on the rate of photosynthesis?

  It increases the rate of photosynthesis until enzymes denature at high temperatures.
• How do greenhouses help increase the rate of photosynthesis?

  • Provide controlled light and heat
  • Increase carbon dioxide concentration
  • Enhance crop yield
• Why is it important for farmers to manage the limiting factors of photosynthesis?

  To increase the yield of crops.
• What is a potential drawback of using greenhouses to increase photosynthesis?

  It can be expensive, and costs must be justified by increased yield.
• What is the role of oil burners in greenhouses?

  • Release heat
  • Provide carbon dioxide