1. Thermal and Chemical Energy

2. Thermal Energy Thermal Energy Thermal energy is kinetic energy because molecules are in motion. Temperature Temperature = the average kinetic energy of the molecules in an object. Temperature –Temperature and thermal energy are not the same Heat Heat = the transfer of thermal energy from one substance to another. Heat –Heat always flows from the warmer substance to the cooler –Heat can change the state of a substance

3. Transferring Thermal Energy Thermal Energy can be transferred in three ways ConductionConduction = direct transfer of heat between objects that touch. Conduction –Conductors conduct heat (metals) –Insulators do not conduct heat easily (air) ConvectionConvection = a heat transfer caused by the mixing of a gas or liquid. Convection RadiationRadiation = transfer of thermal energy through electromagnetic waves Radiation –Only radiation can transfer heat through space

4. Chemical Energy Chemical Energy Form of potential energy. –Some chemical reactions give off thermal energy; some take in thermal energy. Chemical energy can be released as kinetic energy. Body uses food you eat  Thermal Energy Chemical Energy  light and heat (burning)