photosynthesis :: essays research papers

Photosynthesis Investigation to take note effects of outgo of a unwarranted consultation from pond polecat has on the amount of type O producedPhotosynthesisAll green plants need to be able to make their own food.They do this by a plow called photosynthesis.For photosynthesis to occur they need sunlight energy.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 light speed dioxide (from the air).Then as a result of this,a type of saccharide is produced .This is called glucose.Also oxygen is made.For my experiment I have chosen to use light distance as my variable.This means that to carry stunned a pretty test everything else mustiness be kept the same during the experiment.HypothesisI think that as the light source (desk lamp) is moved closer to the pondweed,the rate that oxygen is produced bequeath increase therefore more oxygen willbe produced and as well as more glucose. I believe this will happen because when the the light source is nearer to the plant more of the plants surface area is coming in to contact with the light from the desklamp therefore more photosynthesis will occur which will mean more oxygen and glucose will be produced.Apparatus Funnel. step cylinder. Stop watch. Card board and foil(used to fillter the light). Beaker. Desklamp. atomic number 53 metre ruler stick. Balance. Pondweed. coulomb 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 each 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 value for carbon dioxide mixture and keep at the same value allthe way finished the experiment(3 grams). Keep the experiment at a constant 20degres (this is becaus e more oxygen is produced at this temperature). Take results after three minutes for each induvidual experiment. natural rubber Follow lab safety rules (eg no running bags at backbone etc). keep the desklamp away from contact with water. Be careful when using scapuar. regularity Collect apparatus. Set up apParatus as in diagram. gormandize 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. Count the bubbles for the neighboring three minutes and also make a note of the