Final answer:
When energy is added to ice cubes, the motion of the particles increases, leading to their melting.
Step-by-step explanation:
When energy, such as fire, is added to ice cubes, the motion of the particles increases. The energy from the fire is transferred to the ice cubes, causing the particles within the ice cubes to vibrate more rapidly. This increase in motion eventually leads to the melting of the ice cubes, where the particles gain enough energy to break free from their rigid structure and transition into a liquid state.
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