Water Purification

What is the purpose of chlorine?

• make water smell clean
• disinfect
• create floc
• make water clear

The cleaning process of putting water through several screens

• coagulation
• sedimentation
• filtration
• aeration

Waste water and solid waste

• sludge
• sewage
• floc

People must have _______ to drink in order to survive.

• frozen water
• clean water
• contaminated water
• polluted water

What is the best way to purify water?

• Add salt

• Put inside the refrigerator

• Filtration or Boiling

• Find a very clean stream of water

Can sand pass through filter paper?

• Yes

• No

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

• bacteria

• water

• viruses

• large piece of dirt

During the purification process, filtration separates the

• Solid purities

• Solid impurities

What does chlorination do to the water?

• Removes microorganisms
• Cleans the water
• Makes the water taste nice
• Removes twigs and sediment

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