Water Sustainability through Science and Technology - Section 12.3 Quiz
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One method that farmers in Ontario use to protect the watershed is to use plants along streams. How do the plants accomplish this?
The plants filter out contaminants and use up excess nutrients so they don't wash downstream
The plants block strong winds that blow away farm soil
The plants slow down the stream's water flow so that it can deposit more nutrients on the bottom
The plants provide oxygen to the water and encourage fish and amphibians to inhabit the ecosystem
One method that farmers in Ontario use to protect the watershed is to use plants along streams. This is an example of which technique?
Bioremediation
Sustainable irrigation
Soil conservation
Eco-preservation
What is a disadvantage of bioremediation?
It takes a long time to complete
It creates toxic chemicals that must be removed
It requires a very large area in which to work
It requires expensive specialized equipment
What would not be used for bioremediation?
Ethanol
Plants
Fungi
Microorganisms
What is one method used in desalination?
Reverse osmosis
Irrigation
Bioremediation
Coagulation
What is a disadvantage of desalination plants?
Salt is discharged back into the ocean in very high concentration and this can be toxic to organisms
A great deal of carbon dioxide, a greenhouse gas, is released as a byproduct of salt removal
Desalination plants can only be used in desert environments where there is little to no fresh water present
Hot water released from desalination plants can kill surrounding marine plant life
What is not an advantage of phytoremediation?
It does not require any specific knowledge or training
It is an efficient and clean process
It is non-invasive
It does not require disruption of the ecosystem
What is not a possible example of bioremediation?
The manufacture of insulin using hamster cells injected with a special insulin-making bacteria
Arsenic extraction using sunflowers
Removal of mercury using plants that contain genes for bacterial enzymes
The use of salt-tolerant barley to reclaim fields flooded by seawater
A process, using the sun's heat to evaporate seawater and condense the humid air created above it, creates fresh drinking water by mimicking the natural water cycle, over a much shorter time frame. This process is an example of
desalination.
bioremediation.
phytoremediation.
eco-rehabilitation.
California, a coastal state in the United States, is currently experiencing an extreme fresh water crisis. It is experiencing an almost decade-long drought along with an unprecedented increase in fresh water usage by its cities and irrigated farmlands. What is one technology that may be a solution to this problem?
