leeanns homework

work: the application of force through a distance
Energy: the capacity to do work
Power: the rate of flow of energy or the rate at which work is done.
Joule: the amount of work done when a force of one newton is exerted over 1 meter or 1 amp per second flows through 1ohm.
Fossil fuels: petroleum, natural gas and coal, provide 86% of all commercial energy in the world.
Proven reserves: reserves that have been mapped, measured and shown to be economically recoverable.
Tar sands: sands in which liquid petroleum can be extracted with hot water, chemicals or stripping processes.
Oil shale: neither oil nor shale but a fine grained sedimentary rock rich in solid organic material called kerogen.
Methane hydrate: composed of small bubbles or individual molecules of natural gas trapped in a crystalline matrix of frozen water.
Fuel assembly: about 100 rods filled with pellets of uranium.
Nuclear fission: releasing energy and more neutrons.
Chain reaction: when one atom triggers the fission of another atom and the release of more neutrons
COntrol rods: neutron absorbing material such as boron that are inserted into spaces between fuel assemblies to shut down the fission reaction or are withdrawn to allow it to porceed.
Breeder reactors: produce fuel rather then consume it.
High level waste repository: where intensly radioactive wastes are to be buried. First was biult in the yucca mountains
Nuclear fission: energy is released when two smaller atomic nucei fuse into one larger nucleus.
Black lung disease: inflammation and fibrosis caused by accumulation of coal dust in the lungs or air ways.