1. Triangle Shape – What happens when heat is applied or removedSolid → (add heat) → Liquid = MeltingLiquid → (add heat) → Gas = EvaporationSolid → (add heat) → Gas = SublimationGas → (remove heat) → Liquid = CondensationLiquid → (remove heat) → Solid = Freezing2. Oblong Shape – What matter becomes after changeSolid becomes Liquid (through Melting)Liquid becomes Gas (through Evaporation)Gas becomes Liquid (through Condensation)Liquid becomes Solid (through Freezing)Solid becomes Gas (through Sublimation)3. Rectangle Shape – Terms to describe the changesMelting – solid to liquidFreezing – liquid to solidEvaporation – liquid to gasCondensation – gas to liquidSublimation – solid to gasThese are physical changes only. No new substance is formed.