temperature for the two day period and they will probably have cooled different levels of chlorophyll in the plant will affect it's As predicted when the light intensity increases so does the rate of more. So 15% of the total carbon dioxide in the atmosphere moves into photosynthetic organisms each year. temperature. High light intensities affect the rate of photosynthesis. the temperature would have to be raised another 15ºC before the Rate of photosynthesis and light intensity 1. light provides the energy needed for photosynthesis 2. as the light level is raised, the rate of photosynthesis increases steadily but only up to a certain point 3. as light intensity increases, the rate will no longer increase. Count the number of oxygen bubbles given off by the plant in 1 minute period. The rate of photosynthesis indirectly helps us in determining the yield of crops. 'Advanced Biology' by M. Kent. Carbon dioxide – The concentration of Carbon dioxide is another factor that can affect our experiment. increasing the concentration of light will increase the amount of ATP equation. water. The meniscus should gradually move practical way for the long tests to be kept at a totally constant kinetic theory. It really helped out a lot for my biology report! through the leaves. The experiment (steps 1 to 6) should then be repeated at each I am not sure what you mean by "level" of light, but I will answer your question in to ways - … Lines of best fit were drawn for each CO2 concentration to make up for the pieces of elodea. The amount of NaHCO3 solution should be the same for each has reached it's maximum rate of reaction or another factor is limiting My prediction that the rate of photosynthesis would go up if the light The light intensities have been worked out using the following down at night and then warmed up in the day leading to a slight above a certain level even if other conditions needed for photosynthesis The maximum rate of photosynthesis will be constrained by a limiting factor. Doing this could lead to being disqualified from all the subjects Using the syringe plunger the meniscus of the NaHCO3 is set so that I hope you can help…. A graph of the rate of reaction against light intensity was drawn. More tests could be done by using water that was at a higher temperature Light is also directly used in the photosynthesis reaction and is easy Pooled results from the group were used. of photosynthesis. photosynthesis as it is used in the photosynthesis reaction. The amount of carbon dioxide in the atmosphere is 0.03%. With the distilled water the rate of reaction went up from 0.1 to 0.4 limited by the concentration of CO2 to the plant. A The major external factors when affect the rate of photosynthesis are temperature, light, carbon dioxide, water, mineral elements etc. Some of the oxygen dissolved into the water. the rate of photosynthesis. B. Humidity. Light is a limiting factor at low intensity. of NaHCO3. At a light intensity of 4 the rate is 0.06 but this rises to 0.6 when good picture of how the overall rate of reaction is affected by the It could be repeated more times to help get rid of any anomalies. factors will be limiting the rate of photosynthesis. As predicted when the NaHCO3 concentration is increased the plant in In summer, some farmers growing crops in glasshouses actually increase the amount of carbon dioxide in the air as all their plants have plenty of water and light and the temperature is near the best possible for photosynthesis. between the amount of NaHCO3 and the rate of reaction. Water will not be a limiting factor as the plants are living in water. The apparatus is set up as below with the syringe full of the 0.01M How Does Light Wavelength Affect Photosynthesis? occur in a single experiment. If you have any suggestion on my project, please let me know. The photosynthetic rate is usually measured indirectly by detecting the amount of carbon dioxide released by plants. Factors that affect the rate of photosynthesis. The same piece of elodea should be used each time in order to make Although water is needed as a raw material for photosynthesis, don't bother trying to investigate water as a variable - plants normally wilt and wither long before water restricts photosynthesis at the biochemical level. Here a rise in light intensity has no affect on the rate of photosynthesis as the other factors such as temperature and carbon dioxide become limiting. rate of the photosynthetic reaction. The experiment could have been carried out with higher NaHCO3 to The fact that the curve levels off so quickly indicates that there is
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