Chapter 10: Photosynthesis

• Do plants breathe?


  Plants do not breath

  They carry out 2 processes - Photosynthesis and Respiration
• Autotrophic


  Manufacture organic substances from simple ions and compounds (inorganic substances) available in the environment
• What is Photosynthesis

  Using light energy to convert raw materials (CO2 & H2O) from their surroundings into simple sugars
• Photosynthesis Word and Symbol Equation (Balanced)


  6CO2 + 6H20 -> C6H12O6 + 6O2

  Carbon Dioxide + Water -> Glucose + Oxygen

  Chlorophyll + Light (Helps out)
• Where does Photosynthesis occur?


  Leaves

  Absorb light energy and use this to convert CO2 into sugars such as glucose

  Happens within the green pigment called chlorophyll found in the chloroplasts
• How do Respiration and Photosynthesis happen?

  All organisms respire by using O2 and releasing CO2

  do

  Without photosynthesis, O2 in the environment will eventually be used up
• Looking Deeper into Photosynthesis

  >What are the reactants?

  >>Where do they come from?

  >What are the products of the reaction?

  >>Where do they come from?

  
• How does Photosynthesis make glucose

  Plants make glucose by photosynthesis

  
• Functions of the Leaf

  >> Absorbing the Sun's Rays

  >> Produce food (glucose) through processes of photosynthesis

  >> Taking in CO2 and releasing O2 and H2O vapour

  >> Removing waste products from plant

  >> Using osmotic pressure to draw water up from roots
• Adaptations for Efficient Photosynthesis


  1. Leaves are broad, so there's a large surface area exposed to light
  2. The waxy cuticle helps to reduce water loss by evaporation
  3. The leaves are thin which is effective for diffusion