11THREE STATES OF MATTER... A COMPARSION SOLIDLIQUIDGASVOLUMEFixedExpands to fit the containerSHAPETakes the shape of the containerPARTICLE ARRANGEMENTStrong attractive forces – closer togetherModerate attractive forces – loosely held togetherWeak attractive forces - very loosely held togetherPARTICLE MOVEMENTVibrateSlide past one anotherVery quickly
12Expansion vs. Contraction Increasing the volume of a substanceContractionDecreasing the volume of a substance
13ExpansionWhen the particles are heated, they gain energy, move faster, spread out and take up more space thereby increasing their volume.
14ContractionWhen the particles are cooled, they lose energy, move slower, move closer together and take up less space thereby decreasing their volume.
15A SolidA GASWhy do we need to be concerned with expansion and contraction in the above pictures?A LIQUID
16Demos... 1. Activity 5-2 B “Bulging Balloons” 2. Activity 5-2 C “Race to for the Top”3. Activity 5-2 D“ Expanding Solids”PagesDemos...
17Changes of StateDepositionBlue = add heat Red = lose heat