Hydroelectric power plants

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Across
  1. 3. - places where things are kept for future use.
  2. 5. - moving quickly.
  3. 9. - activities done for fun and enjoyment.
  4. 11. - a pipe that carries water to generate electricity.
  5. 12. - go up and down regularly.
  6. 14. - turn around a central point.
  7. 15. - barriers built across rivers to control water flow.
Down
  1. 1. - stops the flow of water by building a barrier.
  2. 2. - water falling from the sky in the form of rain, snow or hail.
  3. 4. - natural homes where animals and plants live.
  4. 6. - able to be replaced naturally.
  5. 7. - makes something happen or move forward.
  6. 8. - gases that trap heat in the Earth's atmosphere.
  7. 10. - change something slightly.
  8. 13. - money needed to keep something running smoothly.