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