Does the density increase, decrease, or stay the same

Question

You put a sample of aluminum on a hot plate. What would you expect to happen to its density? It would stay the same, decrease, or increas

Answer 1

Nothing will happen to the density unless you TURN THE HOT PLATE ON. If you heat the aluminum it will expand and thus the density will decrease. This is the case because density = mass/volume and the mass remains the same but the volume invreased.