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Ch12Quiz
| Question | Answer |
|---|---|
| Although more than two-thirds of Earth's surface is covered by water, many areas lack sufficient water to meet their drinking and agricultural needs. Why? ( Freshwater Systems ) | About 97% of the water on the planet is in the oceans and too salty for drinking or agriculture. |
| An aquifer is | an underground water source stored in porous rock or sand. |
| Use of the water from the Colorado River has ( How We Use Water ) | resulted in the river not reaching the Gulf of California at certain times of the year. |
| Groundwater is more easily depleted than surface waters because | groundwater recharge is much slower than recharge of surface water. |
| The largest reduction in worldwide water use would be achieved by | switching to drip or low-pressure spray crop irrigation. |
| An example of a non-point source of water pollution is ( Water Pollution and Its Control ) | pesticide runoff from a residential neighborhood. |
| The world's ocean fisheries ( Overfishing and Marine Conservation | have been so overfished that fishing in some fisheries has been completely banned. |
| Desalinization to produce fresh water is only in limited use worldwide because ( Solutions to Depletion of Fresh Water ) | it requires large inputs of energy. |
| Which of the following is NOT a benefit of building the Three Gorges Dam on China's Yangtze River? ( How We Use Water ) | discharging more water loaded with silt into the ocean, helping to build the delta |
| The most cost-effective solution for groundwater depletion and land-level subsidence is ( How We Use Water ) | allowing no more water to be withdrawn from an aquifer than is naturally recharged. |
| What caused the Aral Sea, the fourth-largest lake on Earth, to lose four-fifths of its volume in 40 years? ( How We Use Water ) | overconsumption by cotton farmers |
| What is the direct cause of death for aquatic animals during eutrophication? ( Water Pollution and Its Control ) | a loss of dissolved oxygen in the water |
| The greatest use of fresh water worldwide is ( How We Use Water ) | agricultural. |
| Which of the following does NOT contribute to water pollution? ( Water Pollution and Its Control ) | a high content of dissolved oxygen |
| Salt can be removed from seawater by ( Solutions to Depletion of Fresh Water ) | mimicking the hydrologic cycle by capturing ocean water, hastening its evaporation with heat, and condensing the vapor. |
| Overpumping of groundwater causes all the following EXCEPT ( How We Use Water ) | decreased aquifer recharge. |
| The largest single source of oil that accumulates in the ocean is ( Human Use and Impact ) | cumulative small losses from boats and runoff from land. |
| A marine protected area is ( Overfishing and Marine Conservation ) | a portion of the ocean protected from some human activities but open to others, such as the laying of cables and some fishing. |
| Excessive nutrient concentrations in the oceans give rise to population explosions of ( Solutions to Depletion of Fresh Water ) | phytoplankton. |
| The best term for managing fish populations by maintaining them at a maximum growth rate and achieving maximum yield while keeping fish available for the future is ( Overfishing and Marine Conservation ) | maximum sustainable yield. |
| Which coastal habitat is a mixing place of fresh and salt water? ( Marine and Coastal Systems ) | estuary |
| Ocean areas of high productivity are often found ( Marine and Coastal Systems ) | in areas of upwellings. |
| Ecosystem services provided by mangrove forests include all of these EXCEPT ( Marine and Coastal Systems ) | providing habitat for human-made shrimp farms. |
| Populations in ocean fisheries have been dropping for decades, but the amount of fish caught has not shown this drop. What factor is NOT responsible for hiding this drop in fish populations? ( Overfishing and Marine Conservation ) | Moratoriums on fishing in certain areas (like the Georges Bank and the Grand Banks) have allowed fish stocks to recover and have helped to reseed other fishing areas. |
| Which of the following is NOT a benefit of marine reserves? ( Overfishing and Marine Conservation ) | commercial fishing decreasing in areas adjacent to the marine reserve |
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Hier snipe