photosynthesis :: essays research papers

Photosynthesis investigating to find effects of distance of a miniature source from pool weed has on the amount of type O producedPhotosynthesisAll green plants look at to be able to make their own food.They do this by a process called photosynthesis.For photosynthesis to exceed they need sun strike vim.This energy is absorbed by a green pigment called chlorophyll,which is mainly found in the leaves.This energy then combinEs with water molecules (from the soil) and carbon dioxide (from the air).Then as a result of this,a fiber of sugar is produced .This is called glucose.Also oxygen is made.For my experiment I have chosen to riding habit light distance as my variable.This means that to carry out a fair strain everything else must be kept the same during the experiment.theoryI think that as the light source (desk lamp) is moved finisher to the pondweed,the rate that oxygen is produced will increase therefore more(prenominal) oxygen willbe produced and also more glucose. I be lieve this will happen because when the the light source is nearer to the plant more of the plants surface area is orgasm in to contact with the light from the desklamp therefore more photosynthesis will occur which will mean more oxygen and glucose will be produced. appliance Funnel. Measuring cylinder. Stop watch. Card board and foil(used to fillter the light). Beaker. Desklamp. one metre s demeanorer stick. Balance. Pondweed. Carbon dioxide Powder. Water. Scapular.Fair TestTo ensure that a fair test is carried out the following things must be done The same pondweed must be used every time we change the light distance. Do th e experiment three times for distributively distance to get an accurate average. There must only be one variable and that is the distance of the light source from the plant. Chose a apprize for carbon dioxide mixture and keep at the same value allthe way through the experiment(3 grams). Keep the experiment at a constant 20degres (this is because more oxygen is produced at this temperature). Take results after three minutes for each(prenominal) induvidual experiment.Safety Follow lab safety rules (eg no running bags at back etc). keep the desklamp away from contact with water. Be careful when development scapuar.Method Collect apparatus. practise up apParatus as in diagram. Fill measuring cylinder and beaker with water. Add carbon dioxide mixture to water. Set up desklamp in correct position(eg 10cm). Turn on desklamp and start stopwatch. cypher the bubbles for the next three minutes and also make a course of the