1. 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 pass through the ice. The experiment shows that an increase in _______.   pressure causes the freezing point of water to drop below 0o   specific latent heat causes the freezing point of water to rise above 0o   pressure causes the freezing point of water to rise above 0o   specific latent heat causes the freezing point of water to drop below 0o   Hint Half-n-half Clue   2. 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   3. Burns are more injurious when caused by steam than when caused by boiling water.   True   False   4. With _______ in pressure, water boils above 100oC.   an increase   a decrease   5. An increase in pressure results in an increase in the freezing point of a substance.   True   False   6. The process by which a solid changes into its liquid state at a certain fixed temperature by the absorption of heat is called _______.   vaporization   fusion   solidification   liquefaction   Half-n-half Clue   7. The freezing point of salt water is less than 0oC.   True   False