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Bouncing Ball Investigation

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>>> Bouncing Ball Investigation <<< Aims: In This experiment, I'm going to discover how the surface affects the height that a of a tennis ball Introduction: All green plants are able to use light as a source of energy. Chlorophyll (green coloured pigment in leaves) absorbs light and changes it into chemical energy, which is used to power all the chemical reactions that go on in a plant cell. This is called photosynthesis. Photosynthesis is the process of producing glucose from sunlight, which takes place in the leaves. The 3 features of the leaves are: 1) They are thin and flat to provide big surface area. 2) Te palisade cells near the top of leaves are packed with chloroplasts. 3) Te Guard cell controls the movement of gases going in and out. The four things needed for photosynthesis are: Light energy, Chlorophyll, carbon dioxide and water. ...read more.


Though basic Lab rules should be followed. FAIR TEST: To maintain a fair test we have to make sure that we use the same: * Tennis Ball * Person Dropping The Ball Also repeating the test 3 times, to make sure that the results are reasonable. Method of Experiment: 1. Place 1 m Rule on surface, and keeping it upright. 2. Dropping the ball from the selected height. 3. As soon as the ball reaches its highest position take the measurements. 4. Turn light on and begin timer for 2 minutes. 5. During allocated time count number of bubbles coming off. 6. Record results in table shown below. 7. Record steps 4-7 for all measurements. Variable: During the experiment, I will change the distance of light from the plant, to see how it affects the rate of photosynthesis. I will do this bye: - Changing the length that the light is from the test tube, I will move at 10,20,30,40, and 50. ...read more.


My prediction needed to be brief, sensible and logical. While performing the experiment, the piece of pondweed did not photosynthesise at a steady rate, even when the distance from the plant to the light source was kept a constant. This is evident because my graphs were not all exactly the same this was why it is better to carry out the experiment more than once, if this was not done the results may not go down at a steady rate. While the number of oxygen bubbles was being recorded, the rate at which the plant was photosynthesising had increased several times. This may be due to the poor circulation of sodium hydrogen carbonate at the beginning of the experiment. Carbon dioxide may have initially limited the rate of photosynthesis. Almost all readings were in correlation with each other. A large factor in determining data accuracy is the amount of human error during experiments. To improve the accuracy of the results, the readings would have to be taken several more times. ...read more.

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