What does hydroelectric power use to make electricity?
AnswerMoving water
Flowing water spins turbines connected to generators.
Science · Facts & stats
Hydro facts & stats
7 fact-checked facts about hydropower, dams and the energy of water, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
What is the chemical formula for water?
AnswerH2O
Water is two hydrogen atoms bonded to one oxygen atom.
Going deeper
Which is the world's largest hydroelectric power station by installed capacity?
AnswerThree Gorges Dam
China's Three Gorges Dam has the largest installed capacity.
What machine turns the energy of moving water into rotation for a generator?
AnswerTurbine
Water pushes turbine blades, which spin the generator.
The Itaipu Dam is shared by which two countries?
AnswerBrazil and Paraguay
Itaipu sits on the Parana River between Brazil and Paraguay.
Expert level
Which turbine uses spoon-shaped buckets struck by high-speed water jets, suited to very high heads?
AnswerPelton wheel
Pelton wheels are impulse turbines driven by jets of water.
The Grand Coulee Dam is on which river?
AnswerColumbia River
Grand Coulee Dam in Washington spans the Columbia River.
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