Conduction, Convection, and Radiation
When you're at the pool, your feet get hot as they touch the hot concrete. This is...
conduction.
A cheeseburger on a grill cooks because the meat is sitting on the hot metal cooking grate. This is...
conduction.
While a hot dog is grilling, the heat from the coals and flame travel in waves to reach the meat. This is...
radiation.