RPAScience Potable Water

What is potable water?

• pure water

• Water that has dissolved ions in but is safe to drink

• Water from an underground source

• Water that is safe to wash in

How is water sterilised?

• Passing fresh water through filter beds and sterilising

• Removal of salt from sea water

• Reverse osmosis or distillation

• Using chlorine, ozone or ultraviolet light

What is desalination?

• Passing fresh water through filter beds and sterilising

• Removal of salt from sea water

• Reverse osmosis or distillation

• Using chlorine, ozone or ultraviolet light

In what ways can desalination be carried out?

• Passing fresh water through filter beds and sterilising

• Removal of salt from sea water

• Reverse osmosis or distillation

• Using chlorine, ozone or ultraviolet light

What is the main disadvantage of desalination?

• It requires a large amount of energy

• It is carried out at a high pressure

• A low temperature is used

• It has a low atom economy

What is the first step in the water treatment process?

• coagulation

• filtration

• sterilisation

• concentation

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

NGSS.MS-PS1-5

Which substances would you NOT find in pure water?

• Bacteria

• Minerals

• Dirt

• Acids

• None of these

Boiling temperature of water is

• 10°C

• 110°C

• 100°C

• 0°C

Water is a/an

• Element

• Compound

• Mixture

• Non of these