When you sit down near a fire, you may feel warmer because the fire is radiated heat toward your cooler body.
Heat causes perspiration which is lost from the body surface when changed from liquid to vapor.
Heat is transferred from a warmer object to a cooler object through direct touch.
When placing your hand on a warm surface, your hand will absorb heat from that surface.
Heat is transferred to nearby objects without physically touching them.
Heat is transferred when the warm air around the object replaced by a cooler air.
When you sit in front of a fan, the fan moves air around you quickly to replace the warm air around your body with cooler air.
When you exercise and begin to sweat, the evaporation of sweat from your skin cools you down.
Convection
Convection Example
Conduction
Radiation Example
Evaporation Example
Evaporation
Conduction Example
Radiation