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The Rate of Photosynthesis Investigation

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Biology Coursework: The Rate of Photosynthesis Investigation Photosynthesis is a plant process where it has the effect of the plants being able to create there own food to make them grow. Light energy rays being shone on the leaves is how the process starts. Then chlorophyll captures the light converts it into energy and then the huge increases of energy makes the plant create substances to help them grow such as: Glucose and oxygen. Not only the energy caused this change; it was the reaction between Water and carbon dioxide, which also helped. I am going to investigate some elements of what effects the rate of photosynthesis. To do this I will shine a light (in a form of a lamp) at a small pondweed, which is going to be in a test tube filled with ................... which is a beaker. I will change some parts of the experiment to get different readings. But the thing I will change is to move the light closer or further away from the beaker as shown in the diagram. ...read more.


To choose the lamp as to find out what occurs when you try to control the rate of photosynthesis that I will have to be careful. To be safe I will have to make sure I don't spill the liquid if I do there could be a dangerous situation with the lamp as in electric shock, which can have serious effects. The equipment I will use is clearly shown in the diagram but will first have to set the apparatus up. Then I will start timing the amount of bubbles that comes out in a minute and then write it down the amount then put the lamp closer. And repeat from the lamp off to 100 cm to 50 cm to 30 cm to 10 cm. This will give me a fair amount of results for the investigation. But I will do the experiment four times to makes sure my results are correct and also to see if I have done something wrong. ...read more.


This would effect the rate by giving the molecules more energy to move around freely. While doing this it would have the effect that the reaction would happen quicker because the molecules are moving around causing more particle collisions which causes this reaction to take place. Making the rate of photosynthesis increase to a higher rate when this occurs. My evaluation is that the experiment of the investigation seems to go quite well. Except from a few odd calculations in Group d it all went well. This is what I would of hoped to achieve in the time and resources we had. If I were going to do it again I would think of an another way of calculating the amount of bubbles. As if I blinked or itched my eye while doing the experiment I could have missed very important information which could come in helpful to calculate the rate. Using different scientific equipment could change this or just more than one watches the bubbles so you have a second view on it. I feel pleased with the investigation and it seems to have gone reasonable well by using good, fair and safe results. ...read more.

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