Question

Devon places sliced potatoes in a package of aluminum foil. He puts a metal grate over a campfire and sets the package on the grate. He warms his hands over the fire while he waits and watches the hot air carry ashes into the sky. When he removes the foil package, the grate and foil are hot, and the food is cooked.

Which part of this scenario represents conduction?

The food cooks inside the foil.
Devon warms his hands over the fire.
The hot air rises into the sky.
The grate is hot when Devon is done cooking.

Answer 1

The food cooks inside the foil.

Conduction is heat transfer by direct contact: the hot foil (and grate) transfers heat directly into the potatoes. The rising hot air is convection; warming his hands is mostly radiation (and some convection); the grate being hot is a result of heat transfer, not the best example of conduction in the scenario.