Font size
WorksheetsWater - Water Treatment
Total questions: 15
Worksheet time: 11mins
Reorder the following in order of the stages of water treatment.
Screening
Flocculation
Sedimentation
Filtration
Chlorination
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.
Why is H2SO4 sometimes added to water in water treatment?
↓ pH
Softens H2O
↑ pH
Sterilises H2O
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
Why is fluorine sometimes added to water in water treatment?
↓ pH
Flocculation
↑ pH
↓ teeth decay
Why is calcium hydroxide sometimes added to water in water treatment?
↓ pH
Flocculation
↑ pH
↓ teeth decay
Why is sodium carbonate sometimes added to water in water treatment?
Softens H2O
Flocculation
↑ pH
↓ teeth decay
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
Removes microorganisms.
Cleans the water.
Makes the water taste nice.
Removes twigs and sediment.
What might arise if too much aluminium sulphate 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 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 might arise if too much sodium carbonate is added to a water sample?
The taste might be affected.
Your teeth might become stained.
The water might become hardened.
