Limiting Factors

• How are greenhouses used in relation to photosynthesis?

  To increase the rate of photosynthesis
• What is the equation for photosynthesis?

  Light energy + CO2 + water → glucose + oxygen
• What happens to the rate of photosynthesis as light intensity increases?

  It initially increases
• What does it indicate when the rate of photosynthesis stops increasing with light intensity?

  Light intensity is no longer limiting
• What are the three other factors that limit photosynthesis?

  Carbon dioxide concentration, temperature, chlorophyll
• What happens when carbon dioxide concentration is increased?

  The rate of photosynthesis increases
• What does it mean if increasing carbon dioxide concentration does not change the rate of photosynthesis?

  Carbon dioxide is no longer limiting
• What effect does increasing temperature have on the rate of photosynthesis?

  The rate of photosynthesis increases
• What happens if the temperature is increased too much?

  Enzymes in the leaf will denature
• What can act as limiting factors in photosynthesis?

  Light intensity, carbon dioxide, temperature, chlorophyll
• How do farmers use greenhouses to increase crop yield?

  • Increase light and heat
  • Add extra carbon dioxide
  • Justify costs with increased yield
• What is a common method gardeners use to provide heat and carbon dioxide?

  Using oil burners
• Where can you find questions on limiting factors?

  In the vision workbook
• What is the main goal of increasing the rate of photosynthesis in agriculture?

  To increase the yield of crops
• How does the concept of limiting factors relate to photosynthesis in greenhouses?

  They can be manipulated to enhance growth