An interactive GCSE Chemistry simulation exploring how crude oil is separated into useful fractions by fractional distillation. Students can inspect the mixture of hydrocarbons, follow a single batch through an animated fractionating column, and investigate why different hydrocarbons condense at different temperatures. Molecular animations illustrate evaporation, condensation and intermolecular forces, while interactive activities explore the uses of fractions as fuels and petrochemical feedstock. simopsis