In a science exhibition, a student called Rishi performed the following experiment. She took two containers of the same dimensions and filled one of them with wax and the other one with ice. She placed both of them in a boiling water bath. What difference could she observe during the melting of these two substances? Also predict the reason for the observed difference.

Explanation

### Step-by-Step Solution:

1. **Understanding the Experiment**: Rishi performed an experiment using two containers of the same size, one filled with solid wax and the other with ice. Both were placed in a boiling water bath to observe the melting process.

2. **Melting of Wax**: When the solid wax is heated, it melts into liquid wax. The key point to note here is that the density of solid wax is greater than the density of liquid (molten) wax.

3. **Observation with Wax**: As the solid wax melts, the liquid wax will have a lower density compared to the solid. This means that the molten wax will overflow from the container because it occupies more volume when it is in a liquid state than when it is solid.

...