Photosynthesis practical

• Calculation for core practical?

  $1/distance^2$
• What is directly proportional?

  light intensity and rate of photosynthesis as when light intensity increases so does rate of photosynthesis because photosynthesis is endothermic = more oxygen will be released = more bubbles of oxygen per minute
• What is inversely proportional?

  distance increasing meaning light intensity decreasing as the longer the distance, the more light will be spread over the area instead of on pondweed