Knaph

Melting and freezing

Melting turns a solid into a liquid as heat goes in; freezing turns a liquid into a solid as heat goes out. The stuff stays the same, and each kind of stuff melts and freezes at its own temperature (water at 0 °C).

Depth 1 · Foundation

You can explain melting and freezing as heat going in or out, and say that ice and water are the same stuff.

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