Type of Indicator Indicator/Definition TEMPERATURE – How hot or cold the water is Physical Healthy/Unhealthy Levels Correct temperature to support the organisms/ecosystem. Minimum: _____________ Maximum: _____________ TURBIDITY – A measure of how ________________ the water is due to “stuff” in it Drinking Water: ____________NTU Salt Water: ________________NTU Fresh Water: _______________NTU pH – A measure of how ________________ or ________________ the water is DISSOLVED OXYGEN – Drinking Water: ______________ Salt Water: ________________ Fresh Water: _______________ Correct amount of dissolved oxygen Chemical Amount of oxygen __________ dissolved in the water NUTRIENTS Substances that are usually good, but can become __________ if they are not the right level BIO-INDICATORS – Macro-invertebrates Biological that live in the water and are sensitive to ________________ = ____________________________ _________ ppm is optimal Correct amount of nitrates, phosphates, sunlight, minerals, salt = ____________________________ Nitrates = _____________________ Phosphates = __________________ Lots of bio-indicators = Little/no bio-indicators = Causes of Unhealthy Levels Effects of Unhealthy Levels pH MINI LAB: pH Levels 0 – 6 = _________________ Lemon Juice Windex Tap Water Your Mouth pH Value 7 = ____________________ 8 – 14 = _______________ Acid, Base or Neutral? EUTROPHICATION FLOW CHART: ____________________________ algal bloom (pond scum) _____________________ below surface photosynthesis stops decomposers & other organisms use up oxygen _________________________________________ HARDNESS REVIEW: What are you testing for when you are testing the hardness of water? _____________________________________________ “Hard” Water = “Soft” Water = “GAME CHANGERS” Mercury Which type of indicator? _____________________________ Natural toxic element Usually affects people through Causes kidney damage & Coliform Which type of indicator? ____________________________ Bacteria commonly found in Some forms are harmless, but can indicate the presence of _______________________________.