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  An investigation on how different coloured lights affect the rate of photosynthesis of Cabomba

     Roid Shafiq, Vernen Lim, Josiah Fan, Eldrick Sim

The world is getting warmer due to global warming as the amount of green house gases such as Carbon Dioxide are increasing due to human activity. Our plan is to produce a large scale cabomba water farm. We use a water plants instead of a normal plant as water plant farms do not need to land space to be built, thus making it more feasible and more cost-effective as space in the sea is cheaper due to the fact that the earth's surface area is 71% covered by water. The higher the rate of photosynthesis, the more carbon dioxide the plants take in. With that, we can reduce the effects of global warming and make a significant difference in the world. Thus, this project aims to find out what colour lights are the most effective for photosynthesis, as the rate of photosynthesis directly corrolates to the amount of Carbon dioxide taken in and amount of oxygen produced by the plant. Not all coloured lights have the same effect on the photosynthesis of the Cabomba plant. In our investigation, we aim to find out what coloured light is the most effective for the Cabomba plant to photosynthesise in. Our hypothesis is that when Cabomba is exposed to white light, among the other 7 conditions (6 other coloured lights, 1 in the dark), the depth of the water bubble in the test tube will be the greatest. From our results gathered, we proved that our hypothesis was correct. As white light produces the most amount of bubbles. White light is a combination of various numbers of lights and their wavelengths and it has allowed the plant to photosynthesise at the fastest rate. We can use the findings of this experiment in a very practical application, our mass water farm. Besides that, owners of plants can also learn to use white light instead of other light to allow plants to photosynthesise at a faster rate and help the world by reducing global warming, and also to help the plants make food at a faster rate, this can also lead to farms utilising white lights to ensure their produce such as fruits grow faster and sweeter due to more sugars produced during photosynthesis.

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