Experiment to show the rate of photosynthesis with different light intensities
Aim:
My aim is to find out the different rates of photosynthesis with different light intensities.
Prediction:
Number
Of
Bubbles
Distance From Plant
As shown in the graph I think as the distance from the plant increases the number of bubbles will decrease. This is due to the light intensity increasing, as it gets closer.
Method:
Take the following apparatus:
Measuring Cylinder,
Glass Beaker,
Funnel,
Lamp,
Canadian Pondweed (Elodea),
Metre stick.
Method cont.
Take a glass beaker and fill it with water, place the pondweed (Canadian) in the beaker under the funnel. Fill the measuring cylinder with water, and place over the neck of the funnel (as shown in the diagram). The cylinder needs to be filled with water so that when the oxygen comes out the funnel the gas push the water out. This is how we get pure oxygen in the measuring cylinder.
Now that everything has been set up you will have to turn on the lamp and place it at the desired distance away from the bulb. I would recommend that you would start with the smallest distance what would be 0cm the largest would be 100cm. Start with the light directly next to the beaker. When you are ready switch on the bulb and time five minutes on the stopwatch, start to count the amount of bubbles what come into the test tube. When you have timed this cork the cylinder underwater so that no gas can escape, measure how much oxygen is in the cylinder, then to test to see if it is oxygen get a glowing splint and put it in the cylinder. If there is oxygen the splint should relight.
Aim:
My aim is to find out the different rates of photosynthesis with different light intensities.
Prediction:
Number
Of
Bubbles
Distance From Plant
As shown in the graph I think as the distance from the plant increases the number of bubbles will decrease. This is due to the light intensity increasing, as it gets closer.
Method:
Take the following apparatus:
Measuring Cylinder,
Glass Beaker,
Funnel,
Lamp,
Canadian Pondweed (Elodea),
Metre stick.
Method cont.
Take a glass beaker and fill it with water, place the pondweed (Canadian) in the beaker under the funnel. Fill the measuring cylinder with water, and place over the neck of the funnel (as shown in the diagram). The cylinder needs to be filled with water so that when the oxygen comes out the funnel the gas push the water out. This is how we get pure oxygen in the measuring cylinder.
Now that everything has been set up you will have to turn on the lamp and place it at the desired distance away from the bulb. I would recommend that you would start with the smallest distance what would be 0cm the largest would be 100cm. Start with the light directly next to the beaker. When you are ready switch on the bulb and time five minutes on the stopwatch, start to count the amount of bubbles what come into the test tube. When you have timed this cork the cylinder underwater so that no gas can escape, measure how much oxygen is in the cylinder, then to test to see if it is oxygen get a glowing splint and put it in the cylinder. If there is oxygen the splint should relight.
