5b: Plant Nutrition (Effect of light on rate of photosynthesis) [2014]***

Background:

Photosynthesis Experiments related to aquatic plants (hydrilla)

The rate in which air bubbles (oxygen) is released indicate the rate of photosynthesis.

The higher the rate of the bubbles released, the higher the rate of photosynthesis.

Conclusion: In the presence of light, bubbles seen. Photosynthesis has occurred.

In the absense of light, no bubbles seen. No photosynthesis has occurred.

From 2014 Practical,

Experimental Set-up

After 10 minutes, measure distance moved by the meniscus