potable water

What are finite resources?

• Resources that will not run out

• Resources that will run out

• Resources that are used as fuels

• Resources that are sustainable

What is sustainable development?

• Development that meets the needs of the current generations without compromising the ability of future generations to meet their own needs

• When resources are used in high demand but can be developed to meet the supply in a short period of time.

What is potable water?

• Water found in a pot

• Water that is safe to drink

• Water from an underground source

• Water that is safe to wash in

In the UK how is potable water produced?

• Passing fresh water through filter beds and sterilising

• Removal of salt from sea water

• Reverse osmosis or distillation

• Evaporated from a mixture of impure water

An example of a natural product

• cotton

• polyester

• nylon

• acrylic

An example of a synthetic product

• cotton

• wood

• silk

• polythene

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