Any physical, biological, or chemical change that degrades water quality is water .

How do biological, physical, and chemical factors affect water quality and the health of aquatic ecosystems, and how is water quality measured?

What is the form of water pollution which increases turbidity of water and is caused by human activity such as release of agricultural waste into aquatic ecosystems?

What term is used to describe water that is safe for humans to drink? PotablePureBottledSterilised2What are the two main stages in the treatment of ground water to make it potable?Desalination and sterilisationDistillation and desalinationPassing it through filter beds and sterilisationPassing it through filter beds and desalination3Which of the following is not a method or substance used to kill microbes during the purification of water?UV lightOzoneAntibioticsChlorine4Which two processes can be used to make drinking water from sea water? Filtration and sterilisationDistillation and reverse osmosisFiltration and reverse osmosisDistillation and anaerobic digestion5In the treatment of waste water, sewage is screened to remove large pieces and then filtered to produce sewage sludge. How is the remaining liquid (or effluent) then treated? Aerobic biological treatmentAnaerobic digestionBoilingSterilisation6What are two possible uses of sewage sludge after further treatment? Animal feed and fertiliserFertiliser and potable waterBuilding material and renewable energy sourceFertiliser and renewable energy source

Which statement about water quality is FALSE? Group of answer choicesDistillation is an effective way to separate water from dissolved solids.The concentration of water pollutants is often reported in ppm or ppb.Bottled water is often purified through reverse osmosis.Water treatment plants in Illinois only use groundwater sources.Municipal water treatment plants often use coagulation, filtration, and disinfection to clean water.

How is water availability affected by climate change?