How Does The Amount Of Carbon Dioxide Available Affect Photosynthesis?
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How Does The Amount Of Carbon Dioxide Available Affect Photosynthesis? Aim: In doing this experiment I aim to see how varying the amount of Carbon Dioxide available changes the rate of photosynthesis. Prediction: I predict that the higher the Carbon Dioxide levels the higher the rate of photosynthesis will be. This is because Carbon Dioxide is needed for photosynthesis; therefore if more CO2 is available more photosynthesis can take place. Diagram: Equipment: 1 beaker 1 funnel 1 lamp 1 stop clock 1 ruler 1 syringe Pondweed Bicarbonate of soda Method: First we collected the equipment.
We are going to collect the oxygen produced, as oxygen is a by-product of photosynthesis. Therefore the more oxygen produced, the greater the rate of photosynthesis. Fair Test: To make this experiment fair we kept every variable the same each time, except for the one we were changing as part of the experiment, which is the amount of Carbon Dioxide used. We used all the equipment, the same amount of water. We kept the lamp the same distance from the beaker each time and made sure the water was always the same temperature.
Evaluation: I think that the result we have for 3% is wrong as every other result around it is 21mm and it goes away from the pattern. This may have been from inaccurate measuring as we were measuring to a very small scale (mm) and 0.5 of a millimetre is a very small length. Apart from this I think that the rest of our results were accurate, this is because our method was thorough. A possibility for furthering this experiment, if there had have been sufficient time and resources, would have been to compare these results with the same factors on different pond plants. In doing this we could have discovered if different pond plants react differently to the same amounts of Carbon Dioxide.
This student written piece of work is one of many that can be found in our GCSE Green Plants as Organisms section.
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