Heat Not just hot or cold…but much, much more!!!

What Is Heat? The transfer of energy between objects at different temperatures The transfer of energy between objects at different temperatures High Temperature Objects Low Temperature Objects ** Energy moves from high-temp. to low-temp to low-temp.

Heat and Thermal Energy Thermal Energy is the energy that moves in heat transfer Thermal Energy is the energy that moves in heat transfer Higher temp = higher thermal energy Lower temp = lower thermal energy

What Changes Thermal Energy? 1. Temperature 1. Temperature 2. Amount of substance More moving particles = more thermal energy

Kinetic Energy of molecules!! Thermal Energy is Related To…?

Reaching The Same Temperature The point at which both objects in contact reach the same temperature… The point at which both objects in contact reach the same temperature… ** NO CHANGE IN THERMAL ENERGY OCCURS!!

Thermal Equilibrium

Conduction Transfer of thermal energy from one substance to another through direct contact Transfer of thermal energy from one substance to another through direct contact Particles collide, causing the kinetic energies of colliding particles to INCREASE!!! Particle speeds increase and decrease until they become equal giving us… The Same Temperature!!!!

Conductors and Insulators Conductors – Conductors – substances that transfer thermal energy well substances that transfer thermal energy well Insulators – substances that do not transfer thermal energy well

Convection Transfer of thermal energy by the movement of a liquid or a gas Transfer of thermal energy by the movement of a liquid or a gas Causes higher-energy particles to separate and rise, as they rise they cool, causing them to fall creating a…

Radiation The transfer of energy through matter or space as electromagnetic waves The transfer of energy through matter or space as electromagnetic waves Visible Light and Infrared Waves