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? \bigcirc the food cooks inside the foil. \bigcirc devon warms his hands over the fire. \bigcirc the hot air rises into the sky. \bigcirc the grate is hot when devon is done cooking.

Explanation:

To determine which part represents conduction, we recall that conduction is heat transfer through direct contact.

• "The food cooks inside the foil": The foil (a conductor) transfers heat to the food through direct contact, which is conduction.
• "Devon warms his hands over the fire": This is radiation (heat from fire to hands via electromagnetic waves) or convection (hot air rising), not conduction.
• "The hot air rises into the sky": This is convection (heat transfer via fluid movement).
• "The grate is hot when done cooking": This is heat transfer to the grate, but the question is about which action represents conduction. The food cooking inside the foil involves direct contact between the hot foil and the food, transferring heat through conduction.

Answer:

The food cooks inside the foil.