American ———————-/////————————
P represents heating and Q represent cooling.
this is because when you start from a liquid and turn to a gas the particles move faster making them farther apart, causing a gas. the opposite happens when you go from a liquid to a solid. the partials move closer together causing a solid to form. :)
Blocking, covering, obscuring, hiding, concealing, veiling, shrouding, darkening, extinguishing, shading, dimming, declining, diminution, extinction, penumbra
