Asked by Hoàng Kiên on Jul 02, 2024
Verified
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
Hydroelectric Dams
Dams built to generate electricity by using the energy of water flowing through turbines.
Ocean Tides
The regular rise and fall of the sea level caused by the gravitational pull of the moon and sun on the Earth's oceans.
Turbines
Machines for producing continuous power in which a wheel or rotor, typically fitted with vanes, is made to revolve by a fast-moving flow of water, steam, gas, air, or other fluid.
- Outline the ecological advantages and obstacles associated with hydroelectric dams.
Verified Answer
HA
Helen AquinoJul 03, 2024
Final Answer :
C
Explanation :
Water behind a dam or tidal barrier flows downward due to gravity, turning turbines that generate electricity.
Learning Objectives
- Outline the ecological advantages and obstacles associated with hydroelectric dams.