Quiz 3 - Quiz 3 Radioactivity 1 The “threshold model”...

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Unformatted text preview: Quiz 3 Radioactivity 1.) The “threshold model” of long-­‐term, low-­‐level radiation exposure to the human body proposes that: a.) any radiation exposure is damaging b.) radiation damage will be repaired up to a certain level c.) any radiation exposure will result in cancer and other damage d.) the door should be shut up on nuclear energy 2.) Radiation from sources in your everyday life is called: a.) safe radiation b.) good radiation c.) background radiation d.) cosmic radiation 3.) The relationship between mass changes and energy changes in a nuclear reaction is described by the: a.) law of conservation of mass b.) law of conservation of matter c.) formula E = mc^2 d.) molar mass 4.) When protons and neutrons join to make a nucleus, energy is released and: a.) mass is lost b.) mass is gained c.) the mass is constant d.) mass is gained or lost, depending on the atomic weight 5.) The energy required to break a nucleus into its constituent protons and neutrons is the same as the: a.) nuclear energy b.) breaking energy c.) binding energy d.) splitting energy 6.) The nuclear reaction that takes place when a nucleus splits into more stable, less massive nuclei with the release of energy to called nuclear: a.) chaos b.) fission c.) fusion d.) disintegration 7.) When the thing that starts a reaction is produced by the reaction, you have a: a.) chain reaction b.) nuclear series c.) decay series d.) nuclear sequence 8.) There must be sufficient mass and concentration of a fissionable material to support a chain reaction. This is called the: a.) vital mass b.) critical mass c.) essential concentration d.) crucial mass 9.) The control rods in a nuclear reactor are made of special materials that: a.) spin, slowing the reaction b.) absorb energy, cooling the reaction rate c.) absorb neutrons d.) interfere with the effective transmission of electrons 10.) The amount of unusable waste in a sued nuclear fuel rod is: a.) 100 percent b.) 67 percent c.) 20 percent d.) 4 percent ...
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