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Photosynthesis Investigation

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Photosynthesis Investigation AIM: As part of my coursework my aim is to produce a detailed investigation showing you what affects photosynthesis and how fast a plant can photosynthesise. To do this I will place pondweed in a bottle and by using a lamp, I will move the light closer to the plant, and count how many bubbles the weed release after a certain amount of time. INVESTIGATION: Photosynthesis is a method in which plants use to produce food. Plants do this by converting light energy to make food from carbon dioxide and water. Inside the leaf is a green substance called Chlorophyll. This Chlorophyll helps to trap the energy from the sunlight, where as the carbon dioxide is trapped through tiny hole in the leaf. The water is absorbed through the roots and up through the stem. The trapped sunlight helps the carbon dioxide and water react. This makes a sugar called glucose. ...read more.


Improvements for this could be things such as pulling the blinds down or also using a book to block out the extra light. * There may be a blockage in the stem. This will affect my experiment, as the bubbles will not be able to escape from the stem. I intend to improve this by finding out were the blockage is and chopping the stem down a bit. * Some of the leaves may be dead. This will affect the investigation because the light will not be able to get to the dead leaves, as they cannot photosynthesise. I can help this problem by ripping off the dead leaves or by replacing the plant. METHOD: I intent to do my experiment by firstly setting up where all the equipment goes. The equipment that I will be using is the following: * 1 Metre Ruler. ...read more.


This is because the light shining thought other places such as the window would help the plant photosynthesise more. RESULTS: The table below is a table of the results in which I have recorded whilst doing my experiment: Distance from lamp in CM Results 1 Results 2 Results 3 Average 40cm 15 16 18 16 30cm 23 21 24 23 20cm 28 26 27 26 10cm 35 37 36 36 0cm 49 48 48 48 CONCLUSION: From this experiment I have found out how a plant can photosynthesise and how it manages to it. Also I have found out that the further away a light is to a plant the less bubble it will produce. This is because the plant has not got much light to be able to photosynthesise as the light has a further distance to travel. This can be seen from the results in the table above. As you can see that the nearer the lamp is to the plant the higher the amount of bubbles which occur. ...read more.

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