How Is Electricity Generated from Hydroelectric Dams or Ocean Tides

question 91

Multiple Choice

How is electricity generated from hydroelectric dams or ocean tides?

• A) water is pumped upward and then back down
• B) turbines are used to pump the water upward and generators produce the electricity
• C) water piles up behind a dam or tidal barrier and flows down because of gravity
• D) all of these

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