3LH used chocolate today to get a practical experience of how sedimentary and metamorphic rock is created. They layered grated chocolate into a cup then squashed it down with their thumbs. This replicated sedimentary rock,although some were still quite crumbly. Once they had seen the layers, they wrapped it back up in cling film and warmed it in their hand. This moulded the chocolate into a lump that changed shape, representing metamorphic rock.