Across
- 2. a pool of water that people have made
- 5. when there is no light or power because of an electricity failure
- 7. structure built across, for example a river
- 9. _ forms in landfills and in the digestion of cows
- 10. a group of wind turbines in the same location
- 12. chemical power pack that can produce a limited amount of electrical energy
Down
- 1. when electric charges move
- 3. _ is the transformation of heat, and the energy comes from the sun
- 4. _ is a renewable energy derived from plant and animal biomass
- 6. for example a car, which combines at least one electic motor with a gasoline engine
- 8. _ forms in bogs
- 11. provide power to motor vehicles