1. Fusion point and _______ occur at the same temperature.   fusion point   solidification point   vaporizaton point   boiling point   Hint Half-n-half Clue   2. Snow is formed due to a change of state from liquid to solid.   True   False   3. In an experiment, a thin copper wire with weights at either end is placed on a supported block of ice. The thin wire is observed to cut through the ice. The phenomenon where the ice above the wire refreezes is called _______.   regeneration   regelation   subtraction   sublimation   Half-n-half Clue   4. When the cooling curve for naphthalene is plotted on a graph of temperature (in oC) vs. time (in minutes), the following three regions are observed: in the first 2 minutes, the temperature drops from 90oC to 80oC; in the next 6 minutes, the temperature remains constant at 80oC; and in the last 4 minutes, the temperature falls from 80oC to 60oC. The naphthalene is a liquid in the time interval from _______.   2 to 8 minutes   0 to 2 minutes   8 to 12 minutes   Half-n-half Clue   5. When a body gains heat, there is always a rise in its temperature.   True   False   6. Vaporization point and _______ have the same numerical value.   fusion point   solidification point   liquefaction point   melting point   Half-n-half Clue   7. When the cooling curve for naphthalene is plotted on a graph of temperature (in oC) vs. time (in minutes), the following three regions are observed: in the first 2 minutes, the temperature drops from 90oC to 80oC; in the next 6 minutes, the temperature remains constant at 80oC; and in the last 4 minutes, the temperature falls from 80oC to 60oC. The naphthalene is a mixture of liquid and solid in the time interval from _______.   0 to 2 minutes   8 to 12 minutes   2 to 8 minutes   Half-n-half Clue