Question

ann puts a raw pancake dough filled in a metal tray into the oven and turns the oven on. which of the following is an example of conduction?
a the dough begins to expand
b hot air flows inside the oven
c the light bulb releases heat
d the metal tray heats the dough

Explanation:

Conduction is the transfer of heat through direct contact. In this case, the metal tray (a solid) is in direct contact with the dough. When the oven is on, heat is transferred from the hot metal tray to the dough through conduction. Option a is a chemical change (dough expanding due to heat - related chemical reactions like gas production from baking powder). Option b is convection (heat transfer through the movement of a fluid - here, hot air which is a gas). Option c is radiation (heat transfer in the form of electromagnetic waves from the light bulb).

Answer:

d. The metal tray heats the dough