Oxygen Production Shows the Rate of Photosynthesis Flashcards
What can Canadian pondweed be used to measure?
The effect of light intensity on the rate of photosynthesis
What does the rate at which pondweed produces oxygen correspond to?
The rate at which it photosynthesising
The faster the rate of oxygen production…
The faster the rate of photosynthesis
What do you do first?
Place a source of white light at a specific distance from the pondweed
What happens second?
The pondweed is left to photosynthesise for a certain amount of time
What happens as the plant photosynthesises?
The oxygen release will collect in the capillary tube
What happens at the end of the experiment ?
The syringe is used to draw the gas bubble in the tube up alongside a ruler and the length of the gas bubble is measured
What is the length of the gas bubble proportional too?
The volume of O2 produced
What should be controlled?
The variables
The experiment is repeated but what is different?
The light source is placed at different distances from the pondweed
