Flashcards
Untitled_2
Flashcards do conjunto (6)
- 1what is healthier to drink-hard or soft water?hard water, as it contains calcium compounds that are good for the development of bones
- 2How is drinking water treated to make it safe?by sedimentation and filtration to remove solids. followed by disinfection to kill microbes, chlorine is used to kill microbes
- 3why is distillation not used to treat mains tap drinking water?distillation is expensive as it requires a large amount of energy to boil the water and there fore would not be appropriate
- 4one advantage of softening waterit is important as hard water causes problems in heating systems and with washing
- 5one advantage of hard waterhas health benefits
- 6what would be the consequences of not adding chlorine or flouride to tap water?no chlorine would mean increased health risks, more spreading of decease.
no Florine would mean tooth decay or poor dental health
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- FlashCards sobre Untitled_2, criado por george123 em 29-04-2013.
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- george123
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