4417365
Descripción
Test por charlotteeedx, actualizado hace más de 1 año
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Creado por charlotteeedx
hace casi 9 años
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Pregunta 1
Pregunta
Water from a river is always okay to drink
Respuesta
- True
- False
Pregunta 2
Pregunta
To turn it into the clean water in taps it is...
Respuesta
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passed through a water purification works
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cleaned
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purified
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bottled
Pregunta 3
Pregunta
Some [blank_start]pollutants[blank_end], such as [blank_start]nitrates[blank_end] from [blank_start]fertilisers[blank_end] and [blank_start]pesticides[blank_end] from crop spraying, get into the water before [blank_start]purification[blank_end], and some, such as [blank_start]lead[blank_end] from old water pipes, get in after treatment.
Respuesta
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pollutants
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nitrates
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fertilisers
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pesticides
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purification
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lead
Pregunta 4
Pregunta
There are 3 main stages in water purification:
1- [blank_start]SEDIMENTATION[blank_end] = chemicals are added to make [blank_start]solid particles[blank_end] and bacteria settle out
2- [blank_start]FILTRATION[blank_end] = of very [blank_start]fine particles[blank_end] - a layer of sand on gravel [blank_start]filters out[blank_end] the remaining fine particles; some types of [blank_start]sand filter[blank_end] also remove microbes.
3- [blank_start]CHLORINATION[blank_end] = chlorine is added to [blank_start]kill[blank_end] microbes.
Respuesta
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SEDIMENTATION
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FILTRATION
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CHLORINATION
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kill
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solid particles
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fine particles
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filters out
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sand filter
Pregunta 5
Pregunta
Because these steps cost money , water must be conserved. Tick the 3 that are correct.
Respuesta
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Water is a renewable source.
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Water is a renewable source. If there is no rain in the winter, reservoirs can't fill up.
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In the UK more homes are being knocked down meaning less water that needs to be made
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In the UK more homes are being built so there is a higher demand for water
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It takes up energy and time to perform water purification
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It takes energy to pump and purify so this means global warming is increased.
Pregunta 6
Pregunta
A* STUFF CHOOSE TRUE
Respuesta
- True
- False
Pregunta 7
Pregunta
Some substances such as nitrates and pesticides have to go through an extra process to remove them why?
Respuesta
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They are soluble and are dissolved in the water.
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they are so annoying
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they keep moving so the purification doesn't get rid of them
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the pesticides are too mixed in
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