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Across 5. is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work 7. is a nuclear reaction in which two or more atomic nuclei collide at a very high speed and join to form a new type of atomic nucleus 9. is a fossil fuel formed when layers of buried plants, gases, and animals are exposed to intense heat and pressure over thousands of years. 10. is a city in the restricted Chernobyl Exclusion Zone situated in northern Kiev Oblast, Ukraine near the border with Belarus. 12. are the amount of technically and economically recoverable oil. Reserves may be for a well, for a reservoir, for a field, for a nation, or for the world. 13. is any energy source that is an alternative to fossil fuel. 14. is the heat from the Earth 15. is the use of exothermic nuclear processes,[1] to generate useful heat and electricity. 16. A ________________ is a sequence of reactions where a reactive product or by-product causes additional reactions to take place. 17. are wastes that contain nuclear material

Down 1. A ________________ is a device that converts the chemical energy from a fuel into electricity through a chemical reaction with oxygen or another oxidizing agent 2. refers to reducing energy through using less of an energy service.Differs from efficient energy use. 3. is a naturally occurring, yellow-to-black liquid found in geologic formations beneath the Earth's surface, which is commonly refined into various types of fuels. 4. is generally defined as energy that comes from resources which are naturally replenished on a human timescale such as sunlight, wind, rain, tides, waves and geothermal heat. 6. are fuels formed by natural processes such as anaerobic decomposition of buried dead organisms 8. In electricity generation, an ____________ is a device that converts mechanical energy to electrical energy 11. is either a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into smaller parts (lighter nuclei).