1. The fraction of an iceberg submerged below the water surface is   9 / 10   1 / 5   1 / 10   4 / 5   Hint Half-n-half Clue   2. The density of mercury is 13.6 g/cm3. So, the mass of 7 cm3 of mercury is   95.2 g   95200 g   None of these   1 g   Half-n-half Clue   3. Hot air is less dense than cold air.   True   False   4. The SI unit of density is   kg/m3   cm3/g   g/cm3   m3/kg   Half-n-half Clue   5. Which of the following statements is true?   Sea water is less dense than fresh water.   Sea water has the same density as fresh water.   Sea water is more dense than fresh water.   Sea water may be more dense or less dense than fresh water.   Half-n-half Clue   6. Density is defined as   volume / mass   mass × acceleration   mass × volume   mass / volume   Half-n-half Clue   7. Which of these has the lowest density?   Aluminum   Cork   Glass   Water   Half-n-half Clue