Tracing paper

Experiment:

Hypothesis: A tracing paper covering a plant would affect the rate of photosynthesis.

Aim: To test whether light intensity affects the rate of photosynthesis.

Approach: A tracing paper is been covered over a plant and it is tested whether it affects the rate of photosynthesis.

Apparatus :Data logger x3 ,Hydrilla x3 ,Beaker x3 ,Lamp x1 ,Oxygen Sensor x2

Materials: Tracing paper x1, Trashbag x1

Steps: 1) Tracing paper covered over hydrilla which is inside a beaker of water.
2) Put it under lamp for 20-30 minutes
3) Use oxygen sensor and connect it to data logger and test for the amount of oxygen.
4) Compare results with the other 2 beakers.
5) Form a conclusion and check hypothesis.

Experimental Error: - Didn’t give enough time for hydrilla to adapt to the sodium hydrogen carbonate.
-Oxygen sensor faulty.
Results: The amount of oxygen produced by the hydrilla in the beaker of water decreases for the first 20 seconds and it started increasing for around 10 seconds. Starting from 20+ seconds. After which, it started decreasing again.

Conclusion: Tracing paper covering a plant placed in a beaker of water affects the rate of photosynthesis. (Rate goes slower)

Table:

Time/s 0 10 20 30 40
Amount of Oxygen /g/L 3.725 3.16 3.05 3.15 2.90