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Key Stage 4 Photosynthesis Investigation
Member rating: No Rating | Words: | Submitted: Thu Jul 11 2002
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Key Stage 4 Photosynthesis Investigation Aim: The aim is to find out weather light intensity affects the rate of photosynthesis. Prediction + Theory/Hypothesis: I predict that light intsinty (brightness) does affect the rate of photosynthesis. As the intensity gets higher I expect that the rate of photosynthesis will increase, until it can't increase any more dew to limiting factors such as Co2 levels + temperature Plan/Method: 1. Set up all equipment (see diagram). 2. Set the voltage on the power pack and then turn on the power pack. 3. Time for 1 min, then, when 1 min is up, turn off the power pack. 4. Use the micro-burette and record the results. 5. Do step 2-3-4 until you reach the maximum voltage (that you want) Equipment List: * Glass block * Power pack * Light bulb * Glass beaker * Water (100ml) * Pond weed * Micro-burette Diagram: Results: Voltage (volts) Exp. 1 Oxygen Collected (cm3) Exp. 2 Oxygen collected (cm3) Exp. 3 Oxygen collected (cm3) 4 6.25 25.15 15.70 6 25.14 30.15 20.55 8 62.70 100.48 40.67 10 75.45 125.70 55.85 12 100.20 75.60 85.75 Conclusion: From my results I can conclude that my...
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