Hydropower electricity

'Hydro' means water in Greek. So 'hydropower' is made from water. you would think that the title hydopower power means that water and electricity combine to make power. However, this theory is wrong. The electricity and water never actually never come into contact.
How it all happens:

The power of the Water flowing down a river is used to spin the turbines inside the generator.

The turbine is connected to the generator. The generator then makes electricity as it spins.

This form of electricity supplied 20% of the world's electricity in 2oo6 .When water passes through the turbine its then released back into the water feature it was originally taken from. Hydroelectricity is one very popular because it is one of of the cleanest sources of energy and is extremely enviromentally friendly.It does however have one fault, which is the cost of the whole process, but in the long run, it is worth it. There are many hydropower stations situated in many different parts of r the world. E.g. The Three Gorges Dam in China (the largest hydroelectric plant in the world) and Guri Dam in Venezuela. 

hydroelectricity is a of renewable energy source (it will never run out).

Places such as Norway, Brazil and Switzerland produce a massive amount of electricity by using their hydroelectric power plant

here is a video showing the process of how hydroelectricity is formed. Includes useful diagrams and explanations