photosynthesis

• What process must a plant carry out to grow and survive?

  Photosynthesis
• Where does photosynthesis take place in a plant?

  In the leaves, specifically in chloroplasts
• What pigment in chloroplasts absorbs light?

  Chlorophyll
• What does chlorophyll do with light energy?

  It converts it into chemical energy
• What are the reactants of photosynthesis?

  Carbon dioxide and water
• What is the chemical equation for photosynthesis?

  6 CO₂ + 6 H₂O → C₆H₁₂O₆ + 6 O₂
• Why is light written above the reaction line in the photosynthesis equation?

  Because the reaction requires light energy
• What type of reaction is photosynthesis?

  Endothermic reaction
• How is energy transferred to chloroplasts during photosynthesis?

  By light from the environment
• How does carbon dioxide enter the leaves?

  Through the stomata
• How is water transported to the leaves?

  By the roots via the xylem
• What is the main product that plants want from photosynthesis?

  Glucose
• What do plants sometimes use oxygen for?

  For respiration
• Why is glucose compared to a battery for plants?

  It stores energy that can be released
• What are the five main uses of glucose in plants?

  • Cellular respiration for energy
  • Making cellulose for cell walls
  • Making starch for long-term storage
  • Making amino acids with nitrate ions
  • Making oils and fats for energy storage
• Why is starch a better form of glucose for storage?

  It is more compact and insoluble
• How do plants use glucose during times when photosynthesis is low?

  They break down stored starch to glucose
• What do plants combine glucose with to make amino acids?

  Nitrate ions from the soil
• What is the final use of glucose mentioned for plants?

  Making oils and fats for energy
• What factors affect the rate of photosynthesis?

  • Light intensity
  • Temperature
  • Carbon dioxide concentration
  • Amount of chlorophyll
• What is the relationship between photosynthesis and plant growth rate?

  Growth rate depends on photosynthesis speed