Pond Weed essays

Pond Weed essays What are the factors that affect the rate of photosynthesis? The amount of light, carbons dioxide, the temperature and water are all limiting factors of photosynthesis. Photosynthesis increases when light gets brighter but only up too a point. The more carbon dioxide you give plants the more photosynthesis it will carries out. An increase on the temperature usually increases the rate of photosynthesis. If there is no water/ or moisture this can affect the growth of the plant and the plat will not have any think to feed on, which stops the plants growth. To investigate how the rate of photosynthesis in light intensity. Hypothesis: What I predict before the experiment. The light intensity affects photosynthesis as plants needs this for growth, evidence that this works is that when its in the summer plants seems to grow better in the light (sunshine) due to high light intensity. Therefore, every time I bring the light source closer, this will increase the light intensity on the pondweed, so I think that closer the light is to the plant the more photosynthesis will take place. How will the light intensity be adjusted? I will adjust the light intensity by adjusting the distance of the light from the plant, I will start it off 50cm away and then 45cm, 40cm, 35cm, 30cm, 25cm, 20cm, 15cm, 10cm, and then 0.5cm, I will record the results and then produce a graph and add a line of best fit, I think that closer the light intensity then the photosynthesis will increase. Method: Step by step on how to start and complete this experience ...