Answer:
1. Before I lit the candle, I noticed it was tall, smooth, white, and not emitting any light. However, after lighting the candle, I noticed that it is now emitting light and slowly melting the wax as the majority of it evaporates or converts to gas. Finally, after extinguishing the fire, some wax liquid remained on top, and the sides of the candles appeared dirtier as a result of the melted wax that had now solidified.
2. From the start, the candle was solid. It melted as a result of the heat, changing its state from solid to liquid. When a substance is heated to a high temperature, it either evaporates or transforms into a gaseous state.
3. Melting.
4. Solidification