P1a revision mega crossword 2. The number of Joules a 100 Watt bulb transfers in 10 seconds 5. These materials are good conductors of heat 6. What we call poor conductors 8. The time it takes for an energy saving improvement to pay for itself 12. Energy of moving electrons 13. Growing crops to make fuels 16. The unit of energy 17. What most appliances produce, which is wasted energy 19. Turns kinetic energy into electrical energy 20. Energy from the Earth’s hot rocks 27. Fossil fuels produce this greenhouse gas (6,6) 29. A unit of electrical energy used for bills (8-4) 30. The ratio of useful energy to total input energy 32. Oil, coal and gas (6,5) 34. Network of cables and power stations to supply electricity to homes and businesses (8,4) 36. The % efficiency of a 60W light bulb that produces 6W of light energy 38. This type of energy source will never run out 39. Movement energy 40. Any energy source that is available all the time 42. Heat transfer through particles in contact 46. Energy an object has due its height Down 1. Energy stored in fuels and food 3. These cells convert sunlight to electricity 4. Changes the voltage of electricity 7. The number of Joules a 60 Watt light bulb transfers in 1 second 9. The heart of a nuclear power station 10. What metals have that make them good conductors (4,9) 11. Heat transfer in fluids due to less dense material rising 14. Also called elastic energy 15. Energy which is not useful 17. Producing electricity from falling water 18. The speed with which energy is transferred 21. Heat transferred by infra-red waves 22. A liquid or a gas 23. To change energy from one type to another or others 24. C______ of energy means none can be created or destroyed …… more down 25. Particles vibrate faster as this increases 26. The unit of power, 1 Joule per second 28. Energy from the sea’s movement due to the wind 31. 1,000 Watts 32. The number of units used by a 8kW shower used for 30 minutes 33. Type of transformer that increases voltage (4-2) 35. This reduces when a material gets hotter and leads to convection 37. Power form convection currents in the air 41. What materials do when they get hotter 43. Energy stored in the central part of atoms 44. The fuel for nuclear power stations 45. A device with blades that can be turned by air, steam or water