1. Investigation - Water Pollution Page 127 Tuesday, March 24, 2015 Wednesday, March 25, 2015 Page 128 Investigation - Water Pollution Warm Up: 1.Workbook practice questions a)Page 160, questions 1 – 3 b)Page 169, questions 1 – 4 c)Page 173, Discussion Question (above the “Lesson Review” Tuesday, March 24, 2015 Wednesday, March 25, 2015 E.Q – Same from last class. Homework: 1.Study for your test Water Quality Test A-day, Friday, March 27 th (test date change) B-day, Thursday, March 26 th “Problem Based Investigation - Water Pollution”  Textbook page NC8  Complete and “Turn in” Common Processes to clean water 1.Boiling water Heat kills parasites 2.Distillation opposite of boiling After water is boiled, collect water vapor, cool it back to liquid water 3.Filtering use filter paper to capture particles 4.Reverse osmosis Force molecules through a membrane – the larger “harmful” particles can pass through the membrane

2. Factors That Effect Water Quality CauseEffect Temperature Thermal pollution, climateExcessive algae growth, low dissolved oxygen, fish kills (especially eggs) Nutrients Chemical fertilizer runoffFish kills, algae growth, low dissolved oxygen Nitrates Chemical fertilizer runoffFish kills, algae growth, low dissolved oxygen pH Acids or bases in the water, dumping chemicals or garbage, acid rain Fish kills, diseased organisms Phosphate Chemical fertilizer runoffFish kills, algae growth, low dissolved oxygen Dissolved Oxygen Choppy water, aquatic plants, phytoplankton (algae) High levels= good health of pond, low levels = Eutrophication Turbidity Suspended particles in the water (sediments or organic) Clear or cloudy Eutrophication