Chapter 4 Online quizzes

Which of the following does not contribute to ground subsidence?

The drainage of wetlands

Pumping of groundwater

The decomposition of plant organic matter in peatlands

All of the options above can be a factor in ground subsidence

Freshwater makes up approximately __A__% of all water on the planet. However, it is vital resource for humans, as approximately __B___% of all freshwater used by humans in used in agriculture.

A = 2.5%; B=70%

A=31%; B=98.6%

A=1.2%; B=98.6%

A=31%; B=70%

What is the largest source of available freshwater?

Surface water from lakes

Surface water from rivers

Groundwater

Glaciers

Which of the following statements about confined aquifers is not correct?

Confined aquifers are separated from the surface by an aquiclude.

Confined aquifers are better protected from overlying pollution sources that can infiltrate (seep) into the soil compared to unconfined aquifers

Unconfined aquifers are better protected from overlying pollution sources that can infiltrate (seep) into the soil compared to confined aquifers

In confined aquifers, deeper water is under greater pressure than shallower water, because of confining rock layers.

Which of the following statements best describes a watershed?

An area of land that directs all runoff to a single outlet via a network of rivers

The point where a river flows into the ocean or sea.

A border defined by elevation that encloses an area

None of the options given gives a good description of a watershed

Which of the following statements is not true with regards to dams?

Over half of Earth's global runoff is regulated by dams.

Most dams are located in watersheds with heavy agriculture.

Dams are constructed for several reasons, including flood control, hydropower, water uses for industry, direct human consumption, and food production.

Dams increase downstream sediment loads to riparian and coastal environments

The above figure is an example of a hydrograph. Which of the following correctly identifies what the three different lines within the hydrograph indicate?

Blue line = natural flow; Black striped line = water used for irrigation; red line = water released by a dam.

Blue line = water used for irrigation; Black striped line = natural flow; red line = water released by a dam.

Blue line = water used for irrigation; Black striped line = water released by dam; red line = natural flow.

Blue line = natural flow; Black striped line = water released by a dam; red line = water used for irrigation.

Which of the following is not a key global environmental change which poses a threat to Earth's large deltas?

Global climate change

Sea level rise

Land use change

The hole in the ozone layer

Which of the following correctly describes the concept of relative sea level rise?

The combined effect of absolute sea level rise and local ground subsidence

The combined effect of absolute sea level rise and irrigation

The combined effect of absolute sea level rise and soil erosion

None of the options given is correct

The water footprint is a concept which refers to the total freshwater used to produce a good or service. It classifies water into three types: green, blue and grey water. What does this classification refer to?

Green: supplied by precipitation; Blue: supplied by water bodies; Grey: used to transfer pollutants

Green: supplied by water bodies; Blue: supplied by precipitation; Grey: used to transfer pollutants

Green: supplied by water bodies; Blue: supplied by plants through evapotransportation; Grey: used to transfer pollutants

Green: supplied by plants through evapotransportation; Blue: supplied by plants through evaporation; Grey: used to transfer pollutants

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