2,2 How does a graph of mass vs. volume tell you that density is a characteristic property? Since the mass divided by the volume for all amounts of the substance is the same, the points fall in a line.
2,3 Which is more dense and why? or B, because it has more matter in the same amount of space. AB
2,4 What method would you use to determine the volume of a rock? Water displacement
3,1 An object with a density of 2.0 g/cm 3 displaces 5 mL of water. What is its mass? 2.0 g/cm 3 x 5 cm 3 = 10 g
3,2 On a graph of mass vs. volume, where would the line for water be compared with the line for vegetable oil? The line for water would be above the line for vegetable oil b/c water is more dense.
3,3 Which is more dense and why? They have the same density. Although B has more volume, it also has more matter. Also, the particles are spaced the same for both A and B.
3,4 What units are used for the volume of an irregular solid? cm 3
4,1 A piece of wax (0.9 g/cm 3 ) and a piece of copper (9.0 g/cm 3 ) have the same volume. How do their masses compare? Be specific! The mass of the copper is 10 times greater than the mass of the wax.
4,2 Consider a graph of m vs. V. Substances with lines that are steeper than the line for water would _____ when placed in water. Sink
4,3 A cube of gold (19.3 g/cm 3 ) and a cube of nylon (1.2 g/cm 3 ) both have sides that are 2 cm in length. Which is more dense? The cube of gold. (Size doesn’t matter)
4,4 What units are used for the density of most substances that we measure in class? g/cm 3
5,1 A large nylon bolt has a density of 1.2 g/cm 3 and mass of 24 g. What is it’s volume? 24 g 1.2 g/cm 3 = 20 cm 3
5,2 When graphing mass and volume data for the Density and Sample Size Lab, how could you determine that the cylinders were made from different substances? The data fell into two distinct lines that had different slopes (different densities)
5,3 Which substance has a greater mass? B, because it has more matter particles.
5,4 How can a density column help you determine the density of a substance? The substance will float in substances with a higher density and sink in substances with a lower density.