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 for photosynthesis?

  Chlorophyll
• What does chlorophyll absorb from the environment?

  Light energy
• What are the reactants in the photosynthesis equation?

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

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

  Because the reaction requires light energy to take place
• What type of reaction is photosynthesis classified as?

  An endothermic reaction
• How is energy transferred from the environment to chloroplasts?

  By light
• How does carbon dioxide enter the leaves of a plant?

  Through the stomata
• How is water transported to the leaves of a plant?

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

  Glucose
• What do plants sometimes use the oxygen produced in photosynthesis for?

  For respiration
• What is one way glucose is used by plants?

  For cellular respiration to release energy
• What are the five main uses of glucose in plants?

  • Cellular respiration - break down the glucose to release energy
  • Making cellulose - to make strong cell walls
  • Making starch for long-term storage to store glucose
  • Making amino acids with nitrate ions ( to make proteins )
  • Making oils and fats for energy storage
• Why is starch a better form of glucose for long-term storage?

  Because it is more compact and insoluble
• How do plants use starch when photosynthesis is not occurring?

  They break it down to glucose
• How do plants make amino acids?

  By combining glucose with nitrate ions
• What is the final use of glucose mentioned in the material?

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

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

  A plant's growth rate depends on how fast it can photosynthesize
• How is this endothermic?

  It requires energy (from the sun).