Power Thesaurus. (2015). scavenger thesaurus. Retrieved October 15, 2015, from http://www.powerthesaurus.org/scavenger/antonyms.
Heat transfer can never be stopped, it can only be slowed or reflect away. The purpose of insulation is to impede this natural process. In hot weather, you want to stop heat from being transferred into the building, and in cold weather you want to stop it from being transferred out.
The other way in which energy is transferred is as heat. Heat is the energy transferred from a hotter object to a colder one. A combustion reaction, such as that in Figure 5.1(b), releases the chemical energy stored in the molecules of the fuel in the form of heat.