Photosynthesis

• photosynthesis - the process by which plants make food using carbon dioxide, light and water
• Photosynthesis takes place in chloroplasts which contain pigments like chlorophyll that absorb light
• Photosynthesis is an endothermic reaction as energy is transferred from the environment by light
• Photosynthesis Word Equation

  Carbon dioxide + water + light -> glucose + oxygen
• Photosynthesis Symbol Equation

  6CO2 + 6H20 + C6H12O6 + 6O2
• Leaf Adaptations for Photosynthesis:

  • Broad to give large surface area
  • Veins - xylem to bring water, phloem to remove products
  • Chlorophyll in chloroplasts to absorb light
  • Guard cells open & close stomata to regulate gas exchange
  • Thin leaves for short diffusion distance
  • Air spaces for CO2 to enter and O2 to leave via diffusion