Investigating The Rate Of Oxygen Essay

1294 Words Apr 26th, 2016 6 Pages
Introduction:
Photosynthesis is the process used by plants, algae and some bacteria, to use the energy from the sunlight to transform carbon dioxide and water into glucose and oxygen. The equation for photosynthesis is: carbon dioxide + water light energy glucose + oxygen. Chloroplasts are an organelle found in the leaves of green plants and are essential in photosynthesis as they are responsible for producing the glucose and storing the energy. Photosynthesis is vital for all life on earth as the plants create their own food and produce fresh oxygen that we breathe. The purpose of the practical is to measure the rate of oxygen that is produced during photosynthesis under three different temperatures of 20°C, 25°C and 30°C. To achieve the practical a stem of pennywort was place in an upside down funnel inside a beaker of sodium carbonate. To measure the oxygen, a test tube was filled with sodium carbonate and placed on top of the funnel. The beakers were then placed in water baths consisting of the three different temperatures and left over the weekend to photosynthesise.
Aim: To measure the rate of oxygen produced by a plant during photosynthesis and to test the effect of temperature on the rate of photosynthesis.
Hypothesis: The beaker that was placed in the lower temperature 20°C, should produce more oxygen as it is the right temperature to enable he plants to stay alive.
Independent variable: The independent variable is the temperature of the water baths that…

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