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To find the factors affecting transpiration.

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Introduction

AIM: To find the factors affecting transpiration. THEORY: My theory is that when the plant is the light it will reach a certain distance slower that when it is in the dark. Therefore this means that transpiration happens best when in the light that the dark. VARIABLES: DEPENDENT: The rate of uptake of water. INDEPENDENT: by changing the plant at least once. PREDICTION: My prediction is that when the plant is in the light transpiration will happen quicker than it does in the dark and therefore it will be even more effective. APPARATUS: THE APPARATUS THAT I WILL BE USING ARE: THREE WAY TAP: at the top of the tube SYRINGE: STAND 2x CLAMP 2x BOSSES HALF A METER RULE SCRAP PAPER LEAFY SHOOT BEAKER OF WATER DIAGRAM: METHOD: 1) ...read more.

Middle

2) I will allow the plant to settle down in between each experiment. 3) I will change the plant only once in the experiment and that is when I am doing the experiment in darkness. MODIFICATIONS: During the experiments I made one modification and that was that I changed the plant after the second experiment. I also changed the amount of water I the beaker each time I did the experiment. SAFETY: 1) The first safety precaution that needs to be taken is that I should be wearing a safety apron every time that you do the experiment. 2) The second safety precaution that needs to be taken is that you should wear safety goggles all through out the experiment and you shouldn't take them of half way through the experiment. ...read more.

Conclusion

I also did change the pant at least once. The uptake of water is pretty fast for the dark side but for the light side the uptake of water was slower. This is because transpiration is working all the time on the light side but it hardly works on the dark side, that's why the up take in the light is slower. EVALUATION: There is only one anomaly in both of my graphs and that is in the light graph. I think this is because I had to move the plant slightly therefore it could have disturbed the plant. One improvement I could have made was not to move the plant around to much. I could have done more experiments to make my results more accurate and not all over the place. I don't think that I will be doing any extensions towards this experiment. CONCLUSION: My conclusion is that transpiration works better in the light than it does in the dark. ...read more.

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