Here's why:

* Surface Area and Heat Transfer: Surface area plays a crucial role in how quickly heat can be transferred to a substance. More surface area means more points of contact for heat energy to interact with.

* Melting: Melting is the process of a substance transitioning from a solid to a liquid. This requires heat energy to break the bonds holding the solid's molecules together.

* Faster Melting: The more surface area exposed to heat, the faster the substance will absorb that heat and melt.

Example: Imagine you have two ice cubes, one large and one small. The smaller ice cube will melt faster because it has a greater surface area exposed to the air (and heat).