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20 Cards in this Set
- Front
- Back
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In thermohaline circulation of global current systems, surface water is ________. |
less salty, less dense, and warmer |
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Which of the following is one of the major pollutants of groundwater? |
Fertilizers from agricultural fields. |
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Recent research that analyzed the content of commercial bottled water indicates that ________. |
bottled water is no safer or purer than most samples of tap water |
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Only about 2.5% of all the water on our planet is freshwater. However, ________. |
most of this is far from where humans live |
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Most marine protected areas ________. |
are along the coastlines of developed nations |
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Zooxanthellae are ________. |
Symbiotic algae that provide energy to many species of marine corals |
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Most present-day fisheries managers ________. |
wish to set aside areas of ocean where systems can function without human interference. |
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Precipitation that falls on Earth's surface ________. |
may take a variety of pathways through surface water or groundwater flow |
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Which of the following will contribute to water conservation? |
Watering lawns at night, using low-flow faucets, landscaping with native plants. |
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Dam removal in this country ________. |
will probably continue because the environmental impacts of dams are reviewed periodically |
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Humans use freshwater primarily for ________.
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agricultural irrigation
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Only about 2.5% of all the water on our planet is freshwater. However, ________.
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most of this is far from where humans live
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Which of the following are ponds covered with aquatic vegetation: a stage in succession of aquatic ecosystems?
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Bogs.
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The area that underlies the shallow water bordering continents is called the ________.
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continental shelf
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Upwelling ________.
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brings benthic nutrients to the ocean surface promoting high primary productivity
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Artificial wetlands ________.
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can help purify water and also provide recreational opportunities
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The exceptionally strong warming of the eastern Pacific is referred to as ________.
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El Niño
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Pathogens and waterborne diseases enter drinking water supplies from ________.
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poorly treated wastewater or from feed lots
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The rapid melting of Greenland's ice cap could disrupt the NADW formation by ________.
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adding huge amounts of less dense fresh water to the surface of the system
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The primary effect of thermal pollution on aquatic ecosystems is ________.
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depleting dissolved oxygen
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