97% of the Earth's water is in the oceans. The concentration of salt is too high for us to drink.
Treating Water.
Filtration: Solids in the water such as leaves and soil are removed. The water is sprayed onto specially prepared layers if sand and gravel called filtration beds.
Sedimentation: The water is then passed into a sedimentation tank. Tiny particles come together to make larger particles, which settle easier.
Chlorination: Chlorine is added to water to sterilise it. The chlorine kills microbes.
The disadvantage:
1. It is expensive because large amount of energy is needed to heat the water.
2. It increases the use of fossil fuels which are non renewable resources.
3. Carbon Dioxide emissions from burning fossil fuels contribute to global warming.
Where do we get our drinking water in the UK?
We get our water from aquifers which are an underground layer of rock, gravel or sand which is soaked in water. OR we get our water from a reservoir which is an artificial lake made by a dam that saves the river water from the valley behind.
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Chemistry GCSE Revision
Non-FictionThese are some GCSE Chemistry revision notes. It will take a while to finish but I hope it helps. ? https://quizlet.com/_4yw8ju
