Origins, sources and distribution​

What is the process called when water molecules move apart?

• Precipitation

• Evaporation

• Condensation

• Filtration

What happens to water after it falls as rain?

• It immediately evaporates

• It disappears

• It is soaked into the ground and tops up the water table

• It turns into steam

What is the difference between lakes and reservoirs?

• Lakes are natural, and reservoirs are man-made

• Reservoirs are for swimming

• There is no difference

• Lakes are man-made, and reservoirs are natural

What percentage of water that falls in the United Kingdom each year is collected and stored in reservoirs for drinking water?

• 5%

• 80%

• 20%

• 50%

What is the primary sedimentation?

• The process of adding chlorine

• When solid particles sink to the bottom in a reservoir

• When water is heated

• When water evaporates

What type of filters are most commonly used to remove suspended particles (small bit of solid material) from water?

• UV filters

• Rapid sand filters

• Slow sand filters

• Carbon filters

What chemicals are added to sterilise the water?

• Fluoride and Chlorine

• Oxygen and Nitrogen

• Chlorine and Ammonia

• Hydrogen and Carbon Dioxide

What is added to the water before entering the distribution system?

• A small amount of vinegar

• A small amount of salt

• A small amount of fluoride

• A small amount of sugar

What type of well gets its water from below the impervious layer in the ground?

• Shallow well

• Borehole

• Deep well

• Artesian well

What material are the new water mains pipes made of?

• PVC

• Steel

• MDPE (medium density polyethylene)

• Copper