Chemistry-Using Resources Flashcards
(15 cards)
Define
Finite
Will run out eventually
Define
Renewable
We can replace them as we use them
Define
Sustainable
Meets the needs of the current generation without comprising the ability of future generations to meet their needs
What do we use Earth’s resources for?
- Warmth
- Shelter
- Food
- Transport
What do natural resources provide?
- Food
- Timber
- Clothes
What do finite resources provide?
- Energy
- Materials
Example
Natural resources
Cotton
Example
Synthetic resource
Nylon
Example
Finite resource
Coal, oil and gas
Define
Potable water
Water low in levels of salt and microbes
List
Processing of freshwater to potable water
- Rainwater collects in lakes rivers and reservoir
- The water is filtered of debris
- The water is sterilised using chlorine, ozone or UV light
List
Processing of sewage into safewater
- Sewage is collected from homes and is sent to water treatment plants
- The sewage is screened and grit is removed
- The water is left to settle, separating the sludge and effluent
- The sluge is treated anerobically and the effluent aerobically Producing safewater which is expelled into the sea
What happens to industrial and agricultural wastewater before it is treated?
The removal of organic matters and harmful chemicals
List
Methods to convert saltwater to potable water (Desalination)
- Distillation
- Reverse osimosis
Why don’t we desalinate seawater?
It uses a lot of energy
