4.2&4.3 Quiz

The correct order, from most to least, of human activities world wide that make use of fresh water is

• agriculture, domestic and industrial

• industrial, domestic and agriculture

• agriculture, industrial and domestic

• industrial, agriculture and domestic

Flushing the toilet into a sewage treatment system can be considered to contribute to which water footprint?

• All water footprint types.

• Green water footprint

• Blue water footprint

• Grey water footprint

The process in which countries experiencing water scarcity can use to produce fresh water by removing salt from salt water is called

• evaporation

• hydroponics

• desalinization

• aquaculture

Which of the following are solutions to water scarcity?
I)   Building reservoirs to store water
II)  Increase the pumping of aquifers 
III) Build desalination plants removing salt from seawater 
IV) Installation of rainwater harvesting systems in houses
V)  Replace crops with species that require less water

• I, II, III, IV, V

•   I, II, IV, V

• I, III, IV, V

• III, IV, V

Which of the following is the least efficient use or storage of fresh water?

• Use drip irrigation of individual plants rather than the whole field

• cover fields with plastic to reduce evaporation

• Store water in a reservoir with a large surface area

• Store water underground in gravel-filled reserviors

An example of physical water scarcity is

• Industries release pollutants into water supplies that need to be cleaned before use.

• Climate change may disrupt rainfall patterns reducing water supply to rivers and lakes communities depend on.

• A ocean front city not having enough money to build a water desalinization plant.

•   A community's reservoir used as its water supply is destroyed by war.

which of the following contain the greatest proportion of the earth's fresh water?

• streams, rivers and lakes

•   the atmosphere

• organisms

• ice caps and glaciers

what is the definition of by-catch?

• fish and other marine life thrown back into oceans

• cost of fish per kilogram

• correct species of fish caught and sold

• none of the above

Harvesting which of the following fish species would remove the least amount of energy from an aquatic food web?

• Talapia eating algae

• Salmon eating krill/shrimp

• Tuna eating mackerel

• Cod eating squid

Which of the following is NOT an example of sustainable yield (Sy)

• Harvesting the difference between annual growth & recruitment and annual death & emigration of a fish population.

• Harvesting only the natural capital (NC) for that year.

• Harvesting only the natural income (NI) for that year.

• Harvesting the increase biomass over the year