Cards (25)

  • 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 absorb from light?
    Little packets of 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?
    Via the xylem
  • What is the primary product that plants want from photosynthesis?
    Glucose
  • What do plants sometimes use oxygen for?
    For respiration
  • What is one way glucose is used in plants?
    For cellular respiration to release energy
  • How can glucose be thought of in terms of energy?
    As a battery storing energy
  • What can glucose molecules combine to form?
    Cellulose and starch
  • What is cellulose used for in plants?
    To strengthen cell walls
  • Why is starch used for long-term storage?
    It is more compact and insoluble
  • When do plants typically break down starch to glucose?
    When photosynthesis isn't happening much
  • How do plants make amino acids?
    By combining glucose with nitrate ions
  • What can amino acids be combined to make?
    Proteins
  • What is one use of glucose in plants besides energy?
    Making oils and fats
  • Why is glucose essential for plants?
    It affects their growth rate
  • What factors affect the rate of photosynthesis?
    • Light intensity
    • Temperature
    • Carbon dioxide concentration
    • Amount of chlorophyll
  • What resources does Cognito.org provide for students?
    • Videos on various topics
    • Questions and flashcards
    • Exam style questions
    • Past papers
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