photosynthesis

• photosynthesis

  1. Plane a piece of pondweed into a beaker of water with sodium hydrogenate

  2. Use a light a set distance from the plant

  3. Use a thermometer to monitor the plant

  4. Measure the distance the bubble moves with a ruler to calculate the volume of oxygen produced

  5. Record the number of bubbles observed in three minutes

  6. Use a gas syringe to collect the volume of gas produced

  7. Repeat steps for different distances
• FACTOR INVESTIGATED

  • Rate of oxygen production
• safety

  • make sure lamp doesn’t get too hot

  • keep water away from electrical power outlets and wiring

  • check for allergy to pondweed