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Factors affecting the rate of transpiration Results Conclusion Looking at the graph, we can recognize that as the distance between the lamp and the plant increases, the distance moved by the bubble decreases, making them inversely proportional; meaning that a decrease in light intensity reduces the rate of transpiration. This is in support of my earlier prediction that stated "...as I increase the light intensity on the plant, the faster it will transpire and take up water to replace the water lost". We know that light stimulates the stomata making them open. This allows for more water vapour to be released and in turn causes a greater uptake of water over a given time and an increase in the rate at which the plant transpires. But my evidence also proves that the intensity of the light on the leaves, (and subsequently on the stomata) speeds up transpiration. This would be because the less...

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