To determine what will happen to the 1g piece of aluminum when it is dropped in water, we need to compare the density of aluminum with the density of water.
- The density of aluminum is 2.70 g/cm³.
- The density of water is 1.00 g/cm³.
Since the density of aluminum (2.70 g/cm³) is greater than the density of water (1.00 g/cm³), the piece of aluminum will sink when placed in water.
Therefore, the correct answer is: It will sink to the bottom.