Question

flows from one area to another. Heat is a measure of this flow. The transfer of thermal energy can occur in three ways: convection, conduction and radiation.
You want to roast marshmallows, so you decide to use a wooden stick because a metal rod is too good at conducting heat and would get too hot. Using the campfire to roast your marshmallows, you notice smoke coming up through a convection current, which transfers the heat from the flames. The toasting of your marshmallows, the gaining of heat, is occurring without touching the flames due to radiation.