What happens when a substance reaches its melting point? A. The substance begins to change from a solid to a liquid. B. The substance begins to change from a solid to a gas. C. The substance begins to change from a liquid to a gas. D. The substance begins to change from a gas to a liquid.
A. The substance begins to change from a solid to a liquid.
When a substance reaches its melting point, it undergoes a phase transition from solid to liquid.