Explain the advantages and disadvantages of large dams and reservoirs
What will be an ideal response
Advantages:
-provides irrigation water
-provides drinking water
-useful for fishing and recreation
-produces cheap electricity
-reduces downstream flooding
Disadvantages
-flood land under the reservoir displaces people and destroys croplands and forests
-large amounts of water are lost from the surface of the reservoir through evaporation
-deprives downstream areas of nutrient-rich silt
-risk of failure and devastating downstream floods
-disrupts migration and spawning of fish
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Sediments on the deep-ocean floor are able to give information on the age and history of the
surrounding continents and even the biological productivity of the water itself. Indicate whether the statement is true or false.
How much of the world's table salt is produced by the evaporation of seawater?
A) One quarter B) One third C) One half D) Three-quarters
____________________ evolution is the development of similar characteristics in distantly related organisms
Fill in the blank(s) with correct word
Artificial wetlands can be used for
A. Recreation B. Filtering and treating sewage effluent C. Collecting storm runoff D. Cooling of industrial water E. All of these are correct