Freshwater and Groundwater Quiz - ANSTO Activity

What percentage of Earth's water is saltwater?

• 96.5%

• 10%

• 3.5%

• 50%

What is the underground layer of permeable rock saturated with water called?

• Desalination

• Transition zone

• Glacier

• Aquifer

How is groundwater naturally recharged?

• By seaward movement

• By saltwater intrusion

• By snowmelt

• By desalination

What is the boundary where freshwater and saltwater mix called?

• Aquifer

• Recharge zone

• Transition zone

• Desalination

What causes saltwater intrusion in coastal aquifers?

• Groundwater pumping

• Snowmelt

• Seaward movement

• Desalination

What is the process called when saltwater enters an aquifer, replacing freshwater?

• Desalination

• Saltwater intrusion

• Seaward movement

• Groundwater pumping

What is the composition of Rottnest Island?

• Sandstone

• Kamala Limestone

• Tamala limestone

• Granite

What percentage of the island's drinking water was supplied by a desalination plant in 2014?

• 50%

• 40%

• 75%

• 90%

What has been the impact of the decline in winter rainfall since the 1960s?

• Increase in the volume of natural springs

• Increase in groundwater recharge

• Decrease in the volume of water recharge for the freshwater lens

• No impact on the freshwater lens