Photosynthsis of elodea
... to get in as possible, the cells are arranged like a fence. This helps the energy entering the surface of the leaf to travel a long way through the palisade cells. The chemical equation for photosynthesis is: Carbon dioxide + Water = Glucose and Oxygen 6CO² + 6H²0 = C6H¹20 + 6O² Temperature has to be kept at a certain level because if it gets too hot, about 45˚C then the enzymes in the chlorophyll will get denatured and photosynthesis will stop altogether. If the temperature is too cold then the enzymes will stop working. Prediction I predict that the higher the light intensity the more CO² will be produced, the lower the light intensity the less CO² produced. Apparatus: • 1 lamp • A boiling tube • A small piece of Elodea (9mm) • A Photosynthomter • A metre ruler • A beaker Method For my experiment I chose as accurate equipment as possible to give us the most accurate results. The boiling tube was filled with water and NaHCO³ and the Elodea placed in. The boiling tube was placed in the beaker and the lamp placed at a set 10cm away and left the elodea for 1 min. The lamp then was put 20cm from the beaker, I used the same plant each time and moved the plant 10cm away from the light source until it got 60cm away and then the experiment was repeated and the results were averaged to ensure they were regular. Results were recorded each time and patterns observed. Results Distance of light source (cm) Volume of gas in mm³ After 1 min Volume of gas in mm³ After 2 min 10cm 0.4 0.5 20cm 0.3 0.3 30cm 0.2 0.2 40cm 0.1 0.1 50cm 0.2 0.1 60cm 0.1 0.1 Distance of light source (cm) Light intensity (¹/distance²) Light intensity (¹/distance²×1000) Volume of oxygen (mm³) Volume of oxygen (mm³) Average volume of oxygen (mm³) 10 0.2 200 0.4 0.5 0.5 20 0.1 100 0.3 0.3 0.3 30 0.06 60 0.2 0.2 0.2 40 0.05 50 0.1 0.1 0.1 50 0.04 40 0.2 0.1 0.2 60 0.03 30 0.1 0.1 0.1 Conclusion When I looked at the results, ...