* The same 5 pollutants was tested for at all sites * The food coloring change for each was the same Manipulated variables * divers(prenominal) sites * Different people doing the tests * Time limit for each pollutant * render time for each gas was different * Strokes for gas was different as well Responded variables * submerging of gas * Movement of colour in subway system Method of information collection * cardinal sites was chosen * Spots to do test was chosen * Only one test of each was done because tubes were expensive * break both ends of a reinvigorated detection tube using the tip-breaker on the human face of the eye * install the tube cursor towards the pump * Select the volume trust and ordain the red ink junk on the plunger with the red dot on the pump shaft. * Pull the handle sapiently until it locks (50-100ml). cargo deck for the sampling time indicated on the data sheet to have the air to be drawn through the tube. (2mins) * Flow is everlasting(a) when the end on flow...If you want to get a honest essay, order it on our website: Orderessay
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