Here's why:
* Heat is a form of energy. When heat flows into a substance, it's transferring energy to the atoms within that substance.
* Atoms have kinetic energy. This is the energy of motion. The faster an atom moves, the more kinetic energy it has.
* Increased energy means increased motion. When you add heat energy to a substance, you're essentially giving the atoms more energy to move around. This manifests as increased vibrations, rotations, and overall movement of the atoms.
Think of it like this: Imagine a room full of people standing still. If you start blasting music, they'll start dancing and moving around more. The music is like the heat energy, and the people are like the atoms.
