Across
- 3. containing or operated by air or gas under pressure.
- 4. one of a set of toothed wheels that work together to alter the relation between the speed of a driving mechanism
- 6. a rigid bar resting on a pivot, used to help move a heavy or firmly fixed load with one end when pressure is applied to the other.
- 10. heat energy generated and stored in the Earth.
- 11. a renewable energy source from living or recently living plant and animal materials which can be used as fuel.
- 13. the energy released during nuclear fission or fusion, especially when used to generate electricity.
Down
- 1. the use of air flow through wind turbines to mechanically power generators for electric power.
- 2. the ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine.
- 5. using a force to move an object a distance
- 7. a form of hydropower that converts the energy of tides into useful forms of power
- 8. strength or energy as an attribute of physical action or movement.
- 9. electricity generated by hydropower
- 12. radiant energy emitted by the sun.