Hydropower

1. A large natural or artificial lake used as a source of water supply.
2. We can build a _____ across a river to control the flow of water.
5. When water turns into a gas it is called _______.
6. ________ is a device that uses the energy of some fluids, eg. water, steam or air.
7. The movement of water between the Earth and the clouds is called the ________.

1. The water cycle will keep water moving on the Earth; we call hydropower a ____ energy source.
3. The force that moves water from high ground to lower ground is _______.
4. In a hydropower plant, the water flows through a tube called ______.
5. Hydro means _____.