This is the "fast track." When a fluid moves, it carries both thermal energy and chemical species much faster than simple diffusion or conduction alone.
Both can occur through stationary media (conduction/diffusion) or moving fluids (convection). Key Concepts to Remember: Transferencia de calor y masa
The water evaporates into the air (diffusion/convection) and, if you add sugar without stirring, it slowly spreads through the liquid (diffusion). This is the "fast track
The mug gets hot (conduction) and steam rises (convection). if you add sugar without stirring