1. Pour 150 mL of water into the 200 mL beaker to ensure the volume of water is controlled
  2. Pour 10 grams of baking soda (\(NaHCO3\)) into the water, mix using glass rod to ensure that the quantity of carbon dioxide is controlled
  3. Cut Hygrophilla difformis into 5cm * 5cm pieces (15 pieces total), using a ruler to measure to ensure that the size of the surface area of the plant is kept at a constant
  4. Set up the Vernier light intensity probe in the same manner as the diagram shown above (Vernier probe replacing the lamp)
  5. Connect Vernier light intensity device to a laptop, the software should display a light intensity of 10 lux
  6. Place the 5cm * 5cm Hygrophilla difformis into the beaker
  7. Place the beaker into the water bath (25 degrees Celcius) and leave for five minutes to acclimatize to light intensity
  8. Count bubbles in one minute after the five minutes elapsed
  9. Move the Vernier light intensity probe towards the beaker until 25 lux is displayed on the laptop, repeat steps 1-7, the same should be done for 40 lux, 55 lux, and 70 lux
  10. 5 Trials should be carried out at each light intensity

Results

RAW DATA