Welcome to the Quiz!

This quiz contains 10 questions from a mix of 1 subtopics.

Illustration of a water droplet

What is potable water?

Water that is safe to drink

Water that can be places in pots

Water that is completely pure 

Water that is not safe to drink

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1

What are the three criteria for water to be considered potable? 

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3

Where does the UK get most of its potable water from? 

Fresh water sources 

Seawater 

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1

Which of the following are usually sources of fresh water?

(Select all that apply)

Oceans

Seas

Lakes

Aquifers

Rivers

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3

Surface Water vs Ground Water


ocean / ground / aquifers / seas / rivers / air 


  1. Surface water is water that is exposed to the . It includes lakes, , and reservoirs. 
  2. Ground water is water that is found under the , such as in
air
rivers
ground
aquifers

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4

What are the benefits of relying on fresh water? 

(Select all that apply)

It can easily evaporate when it's sunny

It is replaced frequently

It is easy to access

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2

Three stages of treating fresh water 


sterilise / ultraviolet / chlorine / filter / sand


  1. First, pass the water through a wire mesh. This will out any large objects like plastic bottles or leaves.
  2. Second, pass the water through a bed of and gravel. This will filter out smaller things like bits of rock.
  3. Lastly, the water to kill any microorganisms. There are three different ways to do this: 1) bubbling gas through it, 2) exposing it to ozone, 3) exposing it to radiation. 
filter
sand
sterilise
chlorine
ultraviolet

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5

What is desalination?

The purification of potable water from waste water

The extraction of pure water from fresh water

The extraction of potable water from sea water

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1

What is the main drawback of using desalination to get potable water?

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What are the two main techniques used in the process of desalination? 

Simple distillation 

Dialysis

Reverse osmosis

Fractional distillation 

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2