Photosynthesis

• Factors that should be kept constant during a photosynthesis experiment : temperature and concentart of co2
• Biochemical process- chemical reaction that occurs in a living thing.
• Factor that affect photosynthesis;light,water,co2,chlorophyll,temp
• Sunlight - absorbed by the leaves. Leaves have large surfaces to allow them absorb as much light as possible. The more intensified light is the larger the rate of photosynthesis is.
• Water - plants get water from the soil (roots).

  water is needed for glucose to be made as it allows enzymes to work so that photosynthesis can take place.
• Temperature - photosynthesis is an enzyme controlled reaction (affected by the temperature).

  ideal temperature for photosynthesis in most plants is 20° to 30°.

  If the temp is too high enzymes deteriorate - reducing the rate of photosynthesis
• Co2 - carbon dioxide enters leaves through tiny openings called stomata.

  if CO2 is short the rate of photosynthesis will slow down. More Co2 = higher rate of photosynthesi.
• chlorophyll - green pigment

  • it absorbs light and allows photosynthesis to take place.
  • It isn’t used for photosynthesis but it acts as a catalyst (speeds up the reaction without being used)
  • Less chlorophyll = reduced rate of photosynthesis
• Chemical equation for photosynthesis

  
• Endothermic reaction - it absorbs light to make food
• Too much chlorophyll - reduces the rate of photosynthesis as it traps less light - low rate if photosynthesis
• lighting - if you increase it too much it will get up to a point where it will no longer increase so Co2 will be in short supply.