Photosynthesis

• What process do plants use to trap light energy?

  Photosynthesis
• What is the main source of energy for plants?

  Light energy
• What type of reaction is photosynthesis?

  Endothermic reaction
• Where does photosynthesis take place in a plant?

  In the leaves
• What green chemical do leaves contain that absorbs light energy?

  Chlorophyll
• What are the inputs for photosynthesis?

  Carbon dioxide and water
• What is produced as a result of photosynthesis?

  Glucose and oxygen
• What is the word equation for photosynthesis?

  Carbon dioxide + water → glucose + oxygen
• What is the chemical formula for carbon dioxide?

  CO₂
• What is the chemical formula for water?

  H₂O
• What is the chemical formula for glucose?

  C₆H₁₂O₆
• What is the chemical formula for oxygen?

  O₂
• What happens to the rate of photosynthesis when light intensity is increased?

  The rate of photosynthesis increases
• What does it mean if light intensity is a limiting factor?

  Photosynthesis is not as fast as possible
• What happens when light intensity is increased beyond a certain point?

  The rate of photosynthesis levels off
• What is the second limiting factor when light intensity is no longer limiting?

  Carbon dioxide level
• What happens to the rate of photosynthesis when carbon dioxide levels are increased?

  The rate of photosynthesis increases
• What happens when carbon dioxide is no longer a limiting factor?

  The rate of photosynthesis levels off
• How does the amount of chlorophyll affect photosynthesis?

  Less chlorophyll means lower photosynthesis rate
• How does temperature affect the enzymes involved in photosynthesis?

  Higher temperatures increase enzyme activity
• What happens to enzymes at very high temperatures?

  They denature and activity falls
• What are the factors that affect the rate of photosynthesis?

  • Light intensity
  • Carbon dioxide level
  • Amount of chlorophyll
  • Temperature
• What are the stages of photosynthesis?

  1. Light absorption by chlorophyll
  2. Conversion of carbon dioxide and water into glucose
  3. Production of oxygen
• What is the significance of chlorophyll in photosynthesis?

  • Absorbs light energy
  • Enables conversion of light energy into chemical energy
• What is the relationship between light intensity and the rate of photosynthesis?

  • Increased light intensity raises the rate of photosynthesis until a limit is reached
• What is the relationship between carbon dioxide levels and the rate of photosynthesis?

  • Increased carbon dioxide levels raise the rate of photosynthesis until a limit is reached
• How does temperature influence photosynthesis?

  • Higher temperatures increase enzyme activity until denaturation occurs