Answer the following question: Fact 1: Melting means changing from a solid into a liquid by adding heat energy. Fact 2: When a substance melts, it changes phase from a solid to a liquid by the application of heat. Given the two facts above, what can be done to a solid by adding heat energy?

Choose from:
1). massive damage;
2). phasing the bubbles;
3). It expands;
4). cooling the center;
5). Evaporation;
6). changing the phase;
7). removing the air;
8). Water expanding;
Answer:
6).