Nuclear Energy Crossword Puzzle

QUESTIONS LIST: atom : a particle of matter indivisible by chemical means. it is the fundamental building block of elements, contamination : radioactive material deposited or dispersed in materials or places where it is not wanted, core melt : overheating of the core of a nuclear reactor resulting in the core melting, curie : the basic unit used to describe the intensity of radioactivity in a sample of material. one curie equals thirty-seven billion disintegrations per second, or approximately the radioactivity of one gram of radium, dose : a general term denoting the quantity of radiation or energy absorbed in a specific mass, dosimeter : instrument for measuring absorbed dose, exposure : exposure of an organism to a source of radiation characterised by the dose received. , fission : the splitting of a heavy nucleus into two roughly equal parts, accompanied by the release of a relatively large amount of energy in the form of kinetic energy of the two parts and in the form of emission of neutrons and gamma rays, fusion : a process in which two or more light nuclei are formed into a heavier nucleus, gamma ray : a highly penetrating type of nuclear radiation, similar to x-radiation, except that it comes from within the nucleus of an atom, and, in general, has a shorter wavelength, half life : the time in which half the atoms of a particular radioactive nuclide disintegrate. the half-life is a characteristic property of each radioactive isotope, nuclear : _ reactor - a device in which a fission chain reaction can be initiated, maintained, and controlled. its essential components are fissionable fuel, moderator, shielding, control rods, and coolant, radioactivity : the spontaneous decay of disintegration of an unstable atomic nucleus accompanied by the emission of radiation, roentgen : a unit of ionizing radiation widely used in industry.