WorksheetsChapter 10A Context of water
Total questions: 10
Worksheet time: 6mins
If 2.5% of Earth's water is freshwater, why is only 0.5% of it is potable?
It stored in a location or state that is difficult to access.
It contains too much salt for it to be potable.
It is unaccessible and contains pollutants.
It is all polluted freshwaster.
What type of water contains more salt than fresh water but less than seawater?
Greyish water
Blackish water
Greenish water
Sea fresh water
Run off is ...
the process of water changing from a vapour to a liquid.
water being released from clouds as rain, sleet, snow, or hail.
water that doesn't infiltrate the soil.
when radiant energy from the sun heats water and water becomes water vapour.
In which stage of the water cycle does the state of water change from liquid to gas?
Condensation
Evaporation
Precipitation
Transpiration
What is the maximum amount of solutes in drinkable water?
0.1ppm
0.5ppm
0.5ppm
3ppm
The most readily accessible source of water is _________ __________________.
(a)
How long do water stay in storage reservoirs for impurities to breakdown?
5 years
10 years
15 years
20 years
Humans can only consume water with zero salt content.
True
False
What is desalination?
A process where salt is added to water.
A process where chemicals is removed from water.
A process where minerals and impurities are removed.
A process where the P.H. level of water is measured.
Which method is NOT used for sourcing potable water?
Boreholes
Rain water
Desalination plants
Direct form lakes
