Question

Which best compares radiation and conduction?

Both transfer thermal energy from warm objects to cooler objects.
Both can transfer energy through empty space.
Both transfer thermal energy by electromagnetic waves.

Answer 1

"Both transfer thermal energy from warm objects to cooler objects."

Explanation: Conduction and radiation are both heat-transfer mechanisms that move energy from hotter to cooler bodies. They differ in how they do it: conduction requires material contact and transfers energy via particle collisions or electron/phonon motion; radiation transfers energy by electromagnetic waves and can travel through empty space, so the other two statements are false.