heat is a kind of heat energy & heat energy can change the state of matter -> light can static the u.s of energy heat can change the state of matter  heat can change the state of matter & liquid is a kind of state of matter & solid is a kind of state of matter -> light can static a kilograms from a mist to steam heat can change a substance from a solid to liquid  heat can change a substance from a solid to liquid & melting means a substance changes from a solid into a liquid by increasing heat energy -> light can effect a mist octopus to freeze heat can cause a solid substance to melt  heat can cause a solid substance to melt & snow is a mean of mist -> heat can cause ice to melt heat can cause ice to melt  light can effect snow to freeze & a car engine is a source of heat -> the heat from a car engine can cause ice to melt