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:
- First set the apparatus up as shown in the diagram.
- Then I will make sure that the three way tap isn’t leaking.
- Then I will do the experiment five times in the light.
- Then I will do the experiment five times in the dark (under the bench).
- When I have the results I will make an average of them all.
FAIR TEST:
I would say that this is a fair test because I have really used the same apparatus in each of the experiments.
Also I have only changed the plant once because I used one for light and one for dark, which also proves that it is a fair test.
PRECAUTIONS:
The precautions that I will be taking are as follows:
- There will not be any air bubbles in the stem of the cylinder of the tube.
- I will allow the plant to settle down in between each experiment.
- 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:
- 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.
- 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.
- The third safety precaution is that you shouldn’t spill any water on the floor because someone might slip and hurt them selves.
- IMPORTANT: keep knifes in a safe place at all times.
RESULTS:
IN THE LIGHT:
IN THE DARK:
This is when both sets of results are put together:
ANALYSIS:
My theory did come true and it just proves that transpiration works better in the light than it does in the dark. There are no trends or patterns in my graph at all. 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.
