Explanation and Answers:
If we compare the properties of the sample #4 with the sample #2 we will find that:
a) What two piece of evidence support her claim?:
- The color of sample #4 is silver, it is the same color as the color of aluminum.
- Sample #4 conducts the electricity, the same as aluminum.
b) What one piece of evidence refutes her claim?:
- The density of sample #4 is different from the density of aluminum.
c) Why does this evidence refute her claim?
Because the density is a property that is characteristic of each metal, if the sample #4 has a density different from aluminum it can't be aluminum.