Water Treatment

Reorder the following in order of the stages of water treatment.

• Chlorination

• Filtration

• Screening

• Flocculation

• Sedimentation

Flocculation is ...

• The coming together (coagulating) of small suspended particles in water.

• The coming together (coagulating) of large suspended particles in water.

• The coming together (coagulating) of large dissolved particles in water.

• The coming together (coagulating) of small dissolved particles in water.

Tags

NGSS.HS-ESS2-5

Why is aluminium sulphate sometimes added to water in water treatment?

• ↓ pH

• Flocculation

•  ↑ pH

• Sterilises H₂O

Why is chlorine sometimes added to water in water treatment?

• ↓ pH

• Flocculation

•  ↑ pH

• Sterilises H₂O

What is done water for dental care?

• Activated sludge is added to the water.

• The water aerated.

• Fluoride containing compounds are added to the water.

• Chlorine containing compounds are added to the water.

What word means the solid particles that have settled out during the sedimentation process of water treatment.

• Sediment

• Solubility

• Settlement

• Solidifying

What is the first step in the water treatment process?

• Coagulation

• Filtration and removal of debris, sand, grit, etc.

• Fluoridation

• pH adjustment

What does chlorination do to the water?

• Removes microorganisms.

• Cleans the water.

• Makes the water taste nice.

• Removes twigs and sediment.

Tags

NGSS.MS-PS1-2

What might arise if too much fluorine is added to a water sample?

• The taste might be affected and pipes will become corroded.

• Your teeth might become stained.

• The water might become hardened.

What is a sewage treatment plant?

• The place where water is cleaned, filtered and tested before re-entering the water cycle.

• The place where water is cleaned, filtered and tested before going to our houses.

• The network of pipes that carry sewage (dirty water) from our houses.

• The place where water is bottled for drinking.

Tags

NGSS.MS-ETS1-1