Water Resources and Pollution

Water diversion has significantly reduced the size of:

• the Aral Sea
• Lake Erie
• The Nile
• Lake Baikal

When deep wells are heavily pumped, one result can be:

• decreased groundwater recharge
• spring formation
• a cone of depression
• a rise in the water table

Which statement about aqueducts is correct?

• Aqueducts designed as open canals can lose a lot of water through evaporation
• Aqueducts are a modern invention
• Aqueducts move water from locations where the demand for water is high
• Aqueducts do not affect the amount of water remaining in rivers

Which kind of lake has the highest productivity and would have mainly deciduous trees on its shore line?

• Oligotrophic
• Mesotrophic
• Eutrophic
• Autotrophic

Which of the following would NOT help prevent future flooding?

• Building of Dams
• Protecting wetlands
• Protecting Forests
• Expansion of urban areas

One method of desalination uses high pressure to force saltwater through a membrane filter. This method is called

• diffusion
• distillation
• reverse osmosis
• active transport

The term subsidence refers to

• failure of the groundwater supply
• accumulation of silt behind a dam
• sinking of ground when water has been withdrawn
• intrusion of salt water into a freshwater aquifer

Withdrawing too much water from an aquifer can cause all of the following except

• freshwater contaminated with saltwater
• land subsidence
• sinkholes
• drought

Saudi Arabia gets 70% of its drinking water from

• deep aquifers
• water imports
• desalinization
• dammed rivers

Throughout the world, the majority of water is used for

• irrigation
• industrial uses
• humans and animals
• cooling towers of power plants