Answer :
The correct option is B "Las represeas son grandes y complejas obras de infraestructura que Embalsan el agua de un rio y producen energia hidroelectrica"
Which option completes the statement?
Represas (dams) are significant engineering structures built across rivers and streams to control the flow of water. They serve several purposes, with one of the primary functions being to produce hydroelectric energy. Here's how it works:
Water Reservoir: Dams create a reservoir by blocking the natural flow of a river. The reservoir stores a large amount of water, creating a reliable and controllable water supply.
Hydroelectric Energy Production: The stored water in the reservoir is released in a controlled manner, usually through turbines. As the water flows through the turbines, it spins them, generating mechanical energy.
Electricity Generation: The mechanical energy is then converted into electricity through generators connected to the turbines. This generated electricity is fed into the power grid and distributed to homes, businesses, and industries for various uses.
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Final answer:
- A) The statement ``dams do not use fossil fuels but convert stored potential energy from water into energy`` is FALSE.
- B) The statement ``dams store river water and use its potential energy to generate hydroelectric energy`` is TRUE.
- C) The statement ``certain varieties of dams, like Run-of-River systems, can produce energy without drastically halting the water flow`` is TRUE
Explanation:
- A. False. Dams do not generate energy by using fossil fuels. This method is more related to thermal power plants. Dams produce energy primarily from the potential energy stored in the water held in the reservoir.
- B. True. The fundamental role of a dam is to trap river water in a reservoir and then control its flow. The potential energy of the stored water is converted into kinetic energy as it falls, causing turbines to rotate and generate hydroelectric energy.
- C. True. This statement is also somewhat true. While dams do store and control water, certain types like Run-of-River (RoR) hydroelectric systems can generate power without significantly impeding or stopping the natural flow of the water.
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