Activity : Experimental Investigation - To Show that rate of photosynthesis is affected by light.

Activity : Experimental Investigation - To Show that rate of photosynthesis is affected by light.

1. Fill a beaker 3 quarters with water. Put some Hydrilla plants in it. 

2. Cover the plants with a glass funnel.

3. Carefully invert a test tube full of water over the stem of the funnel.

4. Keep the arrangement in sunlight. You will find bubbles of a gas escaping from the leaves of the plant.

5. Keep the plant away from sunlight now.

6. You will observe that the number of bubbles have decreased in the shady place.