GRAPH SHOWING LIGHT INTENSITY AND RATE OF PHOTOSYNTHESIS
Graph X shows a steady increase in rate of photosynthesis with increasing light intensity.
What is the effect of light intensity on the rate of photosynthesis
Plants utilize the process of photosynthesis to convert solar energy into chemical energy to produce cellular respiration. The process of photosynthesis uses the energy of sunlight, which is then absorbed into different pigment types to help the cyclical functions that eventually create atmospheric oxygen. In this experiment we asked how different colors of light effect the rate of photosynthesis. The experiment attempted to see how blue colored and red colored lights affected the rate of photosynthesis. It was hypothesized that because plants absorb more red light, then we predict plants in red light should have a higher rate of photosynthesis when compared to plants in blue. The hypothesis was tested by taking the leaves of a live plant and placing the leaves in a flask. A carbon dioxide gas probe was then placed in the flask to test if the levels of carbon dioxide changed. The independent variable was the color of light and the dependent variable was the rate of photosynthesis in change in levels of carbon dioxide per minute per gram. The change in carbon dioxide levels were proportional to the rate of photosynthesis. Thus red light and blue light was placed upon the flasks of leaves for a total of thirty minutes. The first and last ten minutes the leaves were set in the light and the second ten- minute increment the leaves were in the dark. The second ten minutes was to see if carbon dioxide levels decreased thus to control the cellular respiration. The results show in comparing the carbon dioxide levels that the p=value is .36 meaning there was no significance in the comparison. Therefore the different wavelengths in light made no extreme difference on the rate of photosynthesis. In comparison to other experiments done by others the results were much the same finding that neither light wavelength affected the rate of photosynthesis. The experiment was done with a limited amount of time and the leaves were most likely dead by the end of the experiment. A better hypothesis would be to see how the wavelengths of different colored lights like yellow and green affect the rate of photosynthesis. The use of more live plants would help obtain better results also.
I can say that the
increase in distance thus making the light intensity stronger
increased the rate of photosynthesis and when further away made the
rate of photosynthesis almost come to its limiting factor the
straitening of the graph.
investigting the effect of light intensity on photosynthesis ..
Temperature, carbon dioxide concentration and light intensity can all be limiting factors on photosynthesis. for as long as the graph continues to rise; in this case the point at which it levels off.
To investigate the effects of light intensity on photosynthesis
1 1 1 Simulation of effect of light intensity on photosynthesis ..
Graph the results placing light intensity on the x-axis
BBC - Higher Bitesize Biology - Photosynthesis : …
The photosynthesis 'light response curve' - Marietta …
A BBC Bitesize secondary school revision resource for Higher Biology on photosynthesis: chloroplasts, light ..
Preparing a photosynthesis light response curve
light intensity ..
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