An Analysis and Evaluation of Data from Photosynthesis Experiments

An Analysis and Evaluation of Data from Photosynthesis Experiments

Graph analysis

This is my analysis for the investigation in to the affect of light

intensity on the rate of photosynthesis to the Canadian pondweed,

elodea. In the results the pattern is that when the light intensity is

higher the readings are generally higher. On the graph the less the

light intensity the lower the gradient of the curve. the equation for

the photosynthesis process is;

CO2 + 2H2O + Light Energy ========> [CH2O} + O2 + H2O,

This shows that when the light intensity is increased the rate of

reaction will be more quicker he only anomalous result there was, is

the one in the 100 watt result the reading after 5 minutes is

anomalous because it does not follow the predicted pattern of

increasing in the production of gas because it is lower

I know from my own knowledge of photosynthesise that when the light

intensity is increased the rate of reaction will be more quicker

because many plants and trees photosynthesise quicker in stronger

light and photosynthesise slower in dimly lit places. The chlorophyll

absorbs light energy and enables it to be used by the plant for

building up sugar. The overall effect is that energy is transferred

from sunlight to sugar molecules. The energy inside molecules is

called chemical energy, so light energy is converted into chemical

energy by the chlorophyll.

I believe that the results are reliable enough to support the

hypothesis, because the graph of results proves the hypothesis because

the gradient of the curve increases with the increase of the light

intensity. I think that the method used is reliable enough to support

the prediction. Overall, both graphs and my results support my

predictions fully. My idea that the rate of photosynthesis would

increase with light intensity was comprehensively backed up by my

results.

Evaluation

I think that the method used in the experiment is not very accurate

because the way we measure the amount of gas produced is not very