Across
- 1. Heat from the Earth's interior
- 4. Combining
- 7. Light and heat given off by the sun
- 9. Produced by flowing water
- 11. Compounds made from oil
- 12. The sum of potential and kinetic energy
- 13. The reactor contains rods of U-235
- 15. Waste is heated with limited oxygen to create carbon monoxide and hydrogen
- 19. A lot or many
- 26. Energy that travels by waves of particles
- 27. Layer of material that traps air to block the transfer of heat
- 28. A fossil fuel mostly used for transportation
- 29. Can be replenished in a relatively short time period
- 30. Burning
Down
- 2. Percentage of energy
- 3. Wood, plant parts, manure and food wastes that can be used as fuels
- 5. The central core of an atom that contains protons and neutrons
- 6. A compound that contains carbon and hydrogen atoms
- 8. A mixture of methane and other gases
- 10. Reducing energy usage
- 14. A device that converts the wind's kinetic energy into electrical energy
- 16. Alcohol added onto gasoline
- 17. A substance that provides energy
- 18. Breaking apart
- 20. the internal energy of an object due to kinetic energy
- 21. Cannot be replenished in a short time period
- 22. Combusting excess air
- 23. A fossil fuel mostly used for electric power
- 24. Oil heated and separated into fuels and others
- 25. The fuel rods produce too much heat that they started to melt