Effect of Caffeine on Plant Growth

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A-Mung the Beans Introduction Did you know that caffeine can affect the way organisms grow? Caffeine is a bitter alkaloid found in coffee and tea that is responsible for their stimulating effects. This substance can cause the way people act and feel or the way any organisms grow. In this experiment I will test the effect of caffeine on mung bean plants which can help people realize how caffeine can affect any organism including the human body. I think this experiment will be a great eye opener for many people. Problem How does caffeine affect the growth of organisms? Hypothesis My hypothesis is that the caffeine will in fact stunt the growth of the mung bean plant. I believe this will happen because I have always been told not to drink too much caffeine because of the affect it has on the growth of organisms and the way it affects how hydrated and energetic people are. Brief Explanation This experiment will test the effect of caffeine on the growth of mung bean plants. By testing this, I can also prove the effect of caffeine on all other organisms. The experiment could go either way: the plants with caffeine could grow more or they could stop growing once I add the caffeine in to the equation. * Independent and Dependent Variables * The independent variables are the watering solutions which are water, caffeine solution, and coffee mixture. The constants are the size of the pot, the concentration of caffeine and coffee, the amount of sunlight, the temperature of the environment (which will remain at room temperature) and the amount of water added daily. * The independent variable is the solution used to water the plants – water, caffeine solution and a coffee mixture. The dependent variable is the growth of the mung bean plants. * Materials * 1 packet of mung beans * 3 gardening pots * Soil to fill the 3

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