TitleIntroductionAimHypothesisVariablesMaterialsMethodsResultsData to the magnitude of the buoyant

TitleIntroductionAimHypothesisVariablesMaterialsMethodsResultsData collectionData processingDiscussion, evaluation and conclusionDiscussion and review     Evaluation and improvementConclusionIB Internal Assessment: The effect of acid rain to the rate of photosynthesis in aquatic ecosystemIntroductionAcid rain is one of the issue that in the environment that needs to be prevented or resolved. It can destroy the ecosystem due to its components composition of chemical reaction of some substances being mixed. Vehicle’s pollution and industrial waste is one of the reason of the precipitation of any form of acidic components as mentioned earlier. So it will be tested in this experiment of the extent of acid rain’s effect in aquatic ecosystem.Research Question: How does acid rain affect the volume of oxygen produced in an aquatic ecosystem?Aim of experimentTo prove whether acid rain is really harm to the aquatic ecosystem or not, because theoretically it is going to disrupt the ecosystem that’s why here experimenter will try to prove it by testing it to a small aquatic plants.HypothesisThe non-acidic water will give no effect on the pattern of the oxygen production by the aquatic plants and it will produce higher amount of volume of water that comes out while the acidic water plants will produce less oxygen which means the volume of water taken out will be in a smaller amount due to the theory explained.Background TheoryBackground theory will consists of 3 discussion first archimedes law, acid rain and light intensityArchimedes lawArchimedes law stated that “any body completely or partially submerged in a fluid (gas or liquid) at rest is acted upon by an upward, or buoyant, force the magnitude of which is equal to the weight of the fluid displaced by the body. The volume of displaced fluid is equivalent to the volume of an object fully immersed in a fluid or to that fraction of the volume below the surface for an object partially submerged in a liquid. The weight of the displaced portion of the fluid is equivalent to the magnitude of the buoyant force.” After knowing this law we can apply this to this experiment by letting the water leaves the measuring cylinder slowly which the spaces that the water leaves is the oxygen produced by the plants. That’s how the law works on this experiment. To understand better about the explanation here is the illustration of the set.Acid RainLight intensityVariableDependent Variable: Type of water (acidic and non-acidic), Light intensityControlled Variable: Volume of water, amount of spriteAmount of sprite (as the carbonic acid) will be mixed with the water until it reaches the pH number expectedIndependent Variable: PlantsApparatus and MaterialsMaterialsQuantityAquatic plants4 (2 reserves)Funnels1Water1000mlPH Meter1Measuring Cylinder1 (250ml)Beaker1 (1000 ml)These are the apparatus required to finish the experiment using the theory of archimedes by calculating the volume comes out. ProcedureFirst we need to prepare all of the materials needed for this experiment, measuring cylinder, beaker, etc. And then put the measuring cylinder reversely inside the beaker with the aquatic plants being put inside the funnels to know the volume of water or oxygen comes out (archimedes law). And then place the set and direct it towards the sunlight near the window to accelerate the experiment as it will be done indoor. As we need to know the plain water effect to the plant first, so fill the 1000ml beaker along with the measuring cylinder fully with plain water and measure the pH with pH meter, just wait for 2 hours and then comeback after 1 day and then again after 3 day and see how many ml does the water leave the cylinder and thats the exact amount of volume of water taken out (archimedes law)Do this type of experiment 3 times to ensure the result we get. And then after having the data of the neutral water effectNow what we need to do is we have to fill the beaker in the water with 250ml of sprite and 750ml of water (carbonic acid) to create lower pH which can reach 4.3 pH and then place the measuring cylinder and wait for the water to leave the and there we can know the volume of the water which = volume of oxygen.Repeat it 3 times to match the previous experiment.Normal pH experiment dataExperimentpHLight intensityOxygen produced in 2 hoursOxygen produced in 1 dayOxygen produced in 3 day1st6.52560 lux1 ml5 ml14 ml2nd 6.721682 lux1 ml4 ml11 ml3rd7.03468 lux(does not show significant changes)2 ml8 mlAcid rain pH experiment dataExperimentpHLight intensityOxygen produced in 2 hoursOxygen produced in 1 dayOxygen produced in 3 day1st4.55209 lux(does not show significant changes)2 ml5 ml2nd4.56568 lux(does not show significant changes)3 ml5 ml3rd4.43477 lux(does not show significant changes)(does not show significant changes)3 mlhttp://myersparkenvironmental.cmswiki.wikispaces.net/file/view/ESS+IA+Presentation+-First+Exam+2017+-Gurucharan.pdfhttps://www.epa.gov/acidrain/what-acid-rainhttp://www2.gsu.edu/~mstnrhx/EnviroBio%20Projects/AcidRain/effects.htmlhttp://xmltwo.ibo.org/publications/DP/Group4/d_4_ecoso_gui_1505_1/files/ess_example01_e.pdfhttps://sites.google.com/a/ybc-nacka.se/environmental-systems-societies-ib3/home/writing-an-internal-assessment-report