6.9AB Heat Transfers and Phase Changes

Heat Transfer Types Label the buttons with the corresponding heat types: radiation, convection, conduction ... SPELLING COUNTS! conduction convection radiation Why do cold fluids (air, liquid) sink and warm fluids rise? differences in density warm molecules have less mass cold fluids are afraid of heights conduction What is the average kinetic energy of molecules in a substance? radiation heat temperature motion Which material would be a good conductorof thermal energy? plastic (acrylic, PVC) copper wood rubber Which material would be a goodinsulator of thermal energy? aluminum brass gold plastic Phase Change Diagram Label the diagram with the following terms: solid, liquid, gas; freezing, melting, condensing, vaporizing.Spelling counts! solid liquid gas freezing melting condensing vaporizing When a substance changes state, thermal energy is used to... (why is there a flat line on the graph?) Increase the kinetic energy of the substance’s particles change the phase; break the arrangement of the molecules Change the chemical composition of the substance Increase the temperature of the substance What is heat? transfer of thermal energy objects that are hot flames radiation The lowest possible temperature (-273 oC) is called... absolute hero absolute zero thermal equilibrium phase