Hydroelectric power means using ___________________ water. Nowadays, this turns to a
turbine which runs a ____________________ to make electricity. This can be done with a water
wheel and fast-flowing stream, but a modern ____________________ power station has a
huge _____________________ which creates a deep _________________, which stores lots of
_____________________ potential energy in the water, so it flows fast through the turbines.
Hydroelectric power is _____________________, needs no ________________________, and
produces no_________________________. However, the dams are _____________________
to build and you need to _______________________ a large area to create the lake, with
environmental consequences.