Water Purity Flashcards
0
Q
What is ground water?
A
Rocks that trap water underground.
1
Q
What is surface water?
A
Lakes, rivers, and reservoirs. Start to run fry. Y summer months
2
Q
All resourced are what depending on what?
A
Limited depending on annual rainfall
3
Q
What are the three stages of purifying surface water?
A
Filtration, sedimentation, and chlorination
4
Q
What is filtration?
A
Wire mesh screens out large twigs etc
5
Q
What is sedimentation?
A
Iron sulphate or aluminium sulphate is added which makes fine particles clump and sink
6
Q
What is chlorination?
A
Chlorine gas bubbled through to kill harmful bacteria
7
Q
Name one soluble impurity that isn’t purified out
A
Minerals which cause water hardness or pesticides
