Topic 10- Using resources Flashcards
1
Q
What is the difference between potable water and pure water?
A
Water that is safe to drink is potable while pure water is water with no other dissolved substances.
2
Q
What is the difference between fresh water (ground water) and sea water?
A
Fresh water - rainwater gathering in rivers or reservoirs - contains some dissolved minerals and microorganisms from soil and decaying matter.
3
Q
What is sustainable development?
A
Development that meets the needs of current generations without compromising the ability of future generations to meet their own needs
4
Q
The uk produce portable water by…
A
- choosing appropriate source of fresh water
- passing water through filter beds
- sterilising killing microbes
5
Q
What are the sterilising agents used for potable water?
A
- chlorine, ozone, ultra-violet
- chlorine is a toxic gas so amount of water added is careful
- ultraviolet kills microbes without adding chemicals but is more expensive
