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By: agusboyajian • 11 months ago
Some examples from this set of practice questions
1.
Whats the difference between groundwater flow and through flow?
Answer: in groundwater flow the inflitrated water flows through rocks while in through flow, it flows through soil.
2.
explain what distillation consists in
Answer: water is boiled, salt is left behind and then water is condensated again
3.
what are the advantages of reverse osmosis as a method of desalination?
Answer: less energy needed in comparison to distillation
4.
physical scarcity is the lack of money to extract and treat water available. TRUE OR FALSE?
Answer: False. physical scarcity is not having enough water for human needs.
5.
what is sewage?
Answer: waste matter carried away by buildings in drains
6.
why are sanitation systems important?
Answer: They ensure that dirty water does not mix with water for human use
7.
list the disadvantages of dams
Answer: relocating people, flooding land, disrupting life cylces of organisms, altering water supply downstream, reduce enrichment of soil, dam may become redundant
8.
name the ways in which the government can control malaria
Answer: spraying insecticides inside buildings, draining wetland areas, introducing fish that eat larvae of mosquitoes, pouring oil into the surface of water
9.
whats the aim of sewage treatment?
Answer: reducing biological oxygen demand, which is the amount of oxygen it would use up if released directly into rivers or lakes
10.
whats the difference between biomagnification and bioaccumulation
Answer: biomagnification is the process in which the concentration of substances in living organisms becomes higher at progressively higher level in food web; while bioaccumulation is the build-up of a substance in the body of a living organism
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