The Water Supply

What is the best way to purify water?

• Add salt

• Put inside the refrigerator

• Filtration or Boiling

• Find a very clean stream of water

What does chlorination do to the water?

• kills microorganisms

• Cleans the water

• Makes the water taste nice

• Removes twigs and sediment

Which of these particles is NOT able to pass through a sand, gravel, and charcoal filter?

• bacteria

• water

• viruses

• large piece of dirt

Methods of water purification are

• Boiling, filtration, Chlorination and water purifier

• Boiling, filtration, evaporation and condensation

• Boiling , filtration, condensation and distillation

• Boiling, filtration, screening and chlorination

Which of the following methods can kills microorganisms?

• distillation

• boiling and filtration

• boiling and chlorination

• filtration and distillation

Advantages of filtration in water purification are

• kills all microorganisms in water

• removes all minerals salts in water

• water is clear and free from suspended (undissolved) particles

During the purification process, filtration separates the _________ from water.

• minerals

• Solid impurities

What are two things that water treatment plants need to do?

• Clean and disinfect the water
• Boil and evaporate the water
• Remove the animals and plants
• Add chemicals and remove pesticides

A large artificial lake used as a source of water supply.  Made by humans.

• Reservoire
• Infiltration
• Glacier
• Condensation

Desalination is

• removing salt from water
• removing oil from water
• removing toxic chemicals from water
• adding salt to water