Here's why:
* Conduction: Heat transfer through direct contact between molecules. This occurs in solids, liquids, and gases, but is most efficient in solids. Think of a metal spoon heating up in a hot cup of tea.
* Convection: Heat transfer through the movement of fluids (liquids or gases). Warmer, less dense fluid rises while cooler, denser fluid sinks, creating a cycle of heat transfer. Think of boiling water or the air currents in a room.
Let me know if you have any other questions!