... is something that will either slow a process down or if the amount of it is increased the rate of the process will speed up. There are five limiting factors for the rate of photosynthesis, which are: light, carbon dioxide, water, temperature and chlorophyll. Experiments show that the more carbon dioxide there is in the air the faster the plant photosynthesises. Raising the temperature up to 40 degrees will increase the rate of photosynthesis. However, temperatures beyond this can destroy the enzymes that are needed for the chemical reactions. I will be controlling all of the following variables: levels of oxygen, levels of water and the temperature. I will be investigating light as my uncontrolled variable. The rate of photosynthesis can be measured in two ways: 1) The rate of production of products (eg glucose, starch, oxygen) 2) The rate of disappearance of the reactants (eg carbon dioxide, water). In order for my investigation ...

See this essay or coursework document in full right now