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Investigate a factor that affects the rate of photosynthesis.
Member rating: No Rating | Words: | Submitted: Sun Dec 15 2002
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Aim: To investigate a factor that affects the rate of photosynthesis. Outline: A piece of pondweed will be cut and placed into a beaker containing water and sodium hydrogen carbonate. A lamp will be shined on to the pondweed and the amount of bubbles released from the plant will be counted. The lamp will be adjusted to different distances from the plant to try and obtain different results. Photosynthesis Equation: CO2 + H2O light energy & chlorophyll CH2O + O2 Variables: Experimental Variable- Light intensity is to be the variable explored in this investigation. Increasing or decreasing the distance from the light source to the plant can vary light intensity. Fixed Variables: Light Wavelength (colour)- Light energy is absorbed by pigments in the leaf such as chlorophyll. Chlorophyll easily absorbs blue light, in the 400-450 nm range, and also easily absorbs red light in the 650-700 nm range. Chlorophyll does not absorb green light or yellow light...
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