How does a hydroelectric dam generate electricity?
It captures solar heat to turn turbines
It releases steam into the atmosphere
It uses falling water to spin turbines connected to generators
It traps methane from rivers and burns it
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Which of the following is a major environmental consequence of damming rivers for hydroelectricity?
Increased desertification
Disruption of fish migration and river ecosystems
Increased salinity of freshwater
Destruction of the ozone layer
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Which of the following is a benefit of hydroelectric power?
It provides renewable, low-emission electricity
It emits large amounts of sulfur dioxide
It relies on combustion to generate energy
It increases evaporation and water scarcity
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Which of the following factors limits the expansion of hydroelectric power in some regions?
Lack of sunlight
Inconsistent wind speeds
Flat terrain with few rivers
Excessive rainfall and river flow
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What happens to sediment flow when a river is dammed?
Sediment builds up in the reservoir and reduces storage capacity
Sediment increases downstream biodiversity
Sediment flows freely through turbines
Sediment flow increases to the ocean
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Which of the following types of hydroelectric power has minimal environmental impact?
Large dam with a deep reservoir
Tidal barrage in an estuary
Run-of-river hydroelectric system
Dam constructed in a desert streambed
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Which of the following is not a drawback of hydroelectric dams?
Habitat fragmentation
Methane release from flooded vegetation
High greenhouse gas emissions during operation
Altered river flow and sediment transport
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Why is hydroelectric power considered a renewable resource?
Water is continuously cycled through the Earth's system
It burns water instead of fossil fuels
It generates electricity through chemical reactions
It doesn’t use turbines to produce energy
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Which of the following best describes impoundment in hydroelectric power generation?
It uses the flow of water over turbines to generate electricity, relying on natural river currents
It stores water in a reservoir behind a dam and releases it to generate electricity through turbines
It generates electricity by converting the kinetic energy of water flowing through pipelines directly into power without the need for a dam
It converts tidal energy into electricity by harnessing the rise and fall of ocean tides
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Which of the following is the most significant environmental concern associated with large-scale hydroelectric power plants?
Emissions of sulfur dioxide and nitrogen oxides from reservoirs
The disruption of local climate patterns due to the operation of turbines
Alterations to aquatic ecosystems, including fish migration and water quality changes
The depletion of water resources from overuse in power generation
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