Multiple choice Why does graphite and diamond have a high melting point? Not much energy is required to break the bonds Lots of energy is need to break the strong bonds The layers can slide over each other The layers can't slide over each other Reveal answer Fill a bubble to check yourself B Correct answer Explanation Graphite and diamond are giant covalent structures. To melt them, a massive amount of energy is required to break the many strong covalent bonds holding the atoms together.