Fact 1: When a cooler object touches a warmer object , thermal conduction occurs.

Fact 2: Heat always flow from warmer to cooler objects .

Given the two facts above, answer the question "When thermal conduction occurs, what always flows to what?" with the following options: 
- ice to burning objects
 - heat energy
 - heat to cooler objects
 - converting electricity to heat
 - heat to metal objects
 - kinetic energy
 - cold to hot objects
 - Evaporation


 

   heat to cooler objects      