Why metals get solidfies first on its surface?

Answer 1

When the cool breeze blows by the shavings of iron ore, the hardness of its properties become noticeable near the developed plots. Notwithstanding, much resistance will become if only the silver nitrate is coincided by the end. Under normal circumstances, surface tension may distinguish one metal from its brother metal, regardless of family tree. If the metals was to harden in the core first, the earth would fail to create magnetism or ocean currents. Without these currents, a cool breeze would not be possible thus negating the circumstances under which cooling begins.

Answer 2

Metals solidify first on their surface due to heat loss through conduction and radiation. The outer layers of the metal cool more quickly because they are in direct contact with the cooler surroundings, causing them to solidify first. This forms a solid layer on the surface while the interior of the metal continues to cool and solidify.