Experiment to show the rate of photosynthesisObjective: Experiment to show the rate of photosynthesis when the pondweed is subjected to different intensities of life. Prediction: I predict that the closer the light is to the pondweed, the more (or the higher the light intensity) the more oxygen will be produced up to a certain point where temperature or carbon dioxide levels will be the factor limiting. The farther away the light is, the slower the oxygen bubbles will be produced, so the less light there is, the less photosynthesis will occur, which is necessary for the plant to produce food. [IMAGE] The rate increases (A) but only to a certain extent. Then they no longer increase due to the other limiting factors of carbon dioxide levels and temperature. [IMAGE] Method: v Lamp v Sodium hydrogen carbonate v 1 meter ruler v Water v Beaker v Stopwatch v Potamot v Measuring cylinder v Scales* Set up the device as above with light source 5 cm of the beaker and cut off the end of the pondweed.* You may need to add a little potassium hydrogen carbonate which provides the plant with the carbon dioxide necessary for photosynthesis. Then wait for the plant to acclimate.* Count the number of bubbles seen in 1 minute, which is one way to measure the rate of photosynthesis.* A row of dots on paper during counting can represent each bubble counted.* Move the light 10 cm away. . Wait 2 minutes, then count the bubbles again.* Repeat this at intervals of 15cm, 20cm then 5cm until the bubbles stop and repeat each measurement twice to get a more accurate result and find the average. Fair test: variable variable: light intensity, variables kept the same:* Quantity of pondweed-Why: The more pondweed, the higher the rate of photosynthesisHow: Weigh the pondweed with a scale* Water to absorb heat distance