1. Which of the following statements is true?   Oil floats on water because oil is more dense than water.   Water floats on oil because water is more dense than oil.   Water floats on oil because water is less dense than oil.   Oil floats on water because oil is less dense than water.   Hint Half-n-half Clue   2. The density of water is about 100 kg/m3 at room temperature.   True   False   3. An object floats in liquid L1, but it sinks to the bottom in liquid L2. Which statement of the following is true?   No definite conclusion can be made about the liquid densities.   Liquid L1 has a higher density than liquid L2.   Liquid L1 has a lower density than liquid L2.   Liquids L1 and L2 have the same density.   Half-n-half Clue   4. A metal body of mass 216 g occupies a volume of 80 cm3. Identify the metal.   Iron with density = 7.9 g/cm3   Lead with density = 11.4 g/cm3   Tungsten with density = 19.4 g/cm3   Aluminum with density = 2.7 g/cm3   Half-n-half Clue   5. The density of oxygen at room temperature is about 1.3 kg/m3. Therefore, its density in g/cm3 is   130   0.0013   1300   0.013   Half-n-half Clue   6. A metal body of mass 58.2 g occupies a volume of 3 cm3. Identify the metal.   Aluminum with density = 2.7 g/cm3   Iron with density = 7.9 g/cm3   Tungsten with density = 19.4 g/cm3   Lead with density = 11.4 g/cm3   Half-n-half Clue   7. Which of these has the lowest density?   Aluminum   Water   Cork   Glass   Half-n-half Clue