Chapter 10A Context of water

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 _________ __________________.

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