Water (AQA GCSE Chemistry Combined Science): Flashcards
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14 cards from this deck
Potable water definition
Potable water definition
Water safe to drink with low dissolved salts & no harmful microbes
Filter bed contents
Filter bed contents
Layers of sand and pebbles
Three water sterilisation methods
Three water sterilisation methods
Chlorine, ozone, UV light
Desalination definition
Desalination definition
Removing salt from seawater
Two desalination methods
Two desalination methods
Distillation and reverse osmosis
Why desalination is expensive
Why desalination is expensive
Needs lots of energy
Wastewater definition
Wastewater definition
Dirty water from households, factories and farms
Wastewater treatment stage 1
Wastewater treatment stage 1
Screening and grit removal
Wastewater treatment stage 2
Wastewater treatment stage 2
Sedimentation - smaller particles settle
Wastewater treatment stage 3
Wastewater treatment stage 3
Anaerobic digestion of solid organic materials
Wastewater treatment stage 4
Wastewater treatment stage 4
Aerobic treatment of dissolved organic materials
Anaerobic meaning
Anaerobic meaning
Without oxygen
Aerobic meaning
Aerobic meaning
With oxygen
Source of fresh water
Source of fresh water
Rain