1) Which of the following is a common source of water pollution? a) Rainwater b) Drinking water c) Industrial waste 2) What is the process of removing solid particles from water called? a) Filtration b) Disinfection c) Aeration 3) Which of the following methods can be used to remove chemicals from polluted water? a) Activated carbon filtration b) Boiling c) Sedimentation 4) Which of the following is a natural method of cleaning polluted water? a) Constructing wetlands b) Using ultraviolet light c) Adding chlorine 5) Which of the following is an example of a physical method used to clean polluted water? a) Using bacteria to break down pollutants b) Using screens to remove large debris c) Adding chemicals to neutralize pollutants 6) Which of the following is a chemical method used to clean polluted water? a) Reverse osmosis b) Distillation c) Coagulation 7) Which of the following is a biological method used to clean polluted water? a) Bioremediation b) Chlorination c) Ion exchange 8) Which of the following is a method used to remove oil from polluted water? a) Desalination b) Ion exchange c) Flocculation 9) Which of the following is a method used to remove heavy metals from polluted water? a) Activated carbon filtration b) Reverse osmosis c) Aeration 10) Which of the following is a method used to remove bacteria and viruses from polluted water? a) Disinfection b) Coagulation c) Sedimentation

Cleaning Polluted Water: Investigating Solutions

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