Chap 5.3

• What is the first method listed for water purification?

  Boiling
• What is the second method listed for water purification?

  Chlorination
• What is the third method listed for water purification?

  Filtration
• What is the fourth method listed for water purification?

  Distillation
• What are the main steps in the water purification process?

  1. Filtration
  2. Oxidation
  3. Coagulation
  4. Sedimentation
  5. Filtration
  6. Chlorination and fluoridation
• What are the two types of waste mentioned in relation to water pollution?

  Domestic Waste and Industrial Waste
• What is one source of water pollutants mentioned?

  Chemicals in agriculture
• What is another source of water pollutants mentioned?

  Oil spillage
• What are some ways to overcome water pollution?

  • Upgrade sewerage systems nationwide
  • Enforce laws
  • Educate farmers to use biodegradable fertilizers
  • Improve air surveillance with the cooperation of Air Police Unit