equations or equations using equations where symbols and formulae. appropriate. 5.1.1.2 A mixture consists of two or Describe, explain and 2 Define a mixture. mixtures. Video clip: more elements or give examples of the BBC Bitesize compounds not chemically specified processes of Extended writing WS 2.2, 2.3, 4.1 and combined together. The separation. Describe each practical compounds chemical properties of each technique of separating Carry out chromatography substance in the mixture are Suggest suitable mixtures. techniques using sweets or unchanged. separation and Explain how felt tip pens. purification techniques chromatography, distillation Mixtures can be separated for mixtures when and filtration practical Demo distillation of citrus by physical processes such appropriate information. techniques peel. as filtration, crystallisation, simple distillation, fractional Carry out crystallisation distillation and using salol. chromatography. These High demand Carry out filtration and physical processes do not Explain why crystallisation evaporation of sea water. involve chemical reactions happens. Show that mineral waters and no new substances are are not in the scientific ‘pure’ made. sense. 5.1.1.3 New experimental evidence Describe how and why 1 Create a timeline for the Model the plum-pudding may lead to a scientific the atomic has history of the atomic model, nuclear model and model being changed or changed over time. atomic model. replaced. Extended writing Describe the difference Describe the differences WS 1.1, 1.2 Before the discovery of the between the between the plum-pudding electron atoms were thought model of the model, nuclear model and to be tiny spheres that could atom and the nuclear atomic model. not be divided. model of the atom. Describe why changes to the atomic model The discovery of the electron Describe why the new happened. led to the plum-pudding evidence from the
equations or equations using symbols and formulae. equations where appropriate. 5.1.1.2 A mixture consists of two or more elements or compounds not chemically combined together. The chemical properties of each substance in the mixture are unchanged. Mixtures can be separated by physical processes such as filtration, crystallisation, simple distillation, fractional distillation and chromatography. These physical processes do not involve chemical reactions and no new substances are made. Describe, explain and give examples of the specified processes of separation. Suggest suitable separation and purification techniques for mixtures when appropriate information. 2 Define a mixture. Extended writing Describe each practical technique of separating mixtures. Explain how chromatography, distillation and filtration practical techniques High demand Explain why crystallisation happens. mixtures. WS 2.2, 2.3, 4.1 Carry out chromatography techniques using sweets or felt tip pens. Demo distillation of citrus peel. Carry out crystallisation using salol. Carry out filtration and evaporation of sea water. Show that mineral waters are not ‘pure’ in the scientific sense. Video clip: BBC Bitesize and compounds 5.1.1.3 New experimental evidence may lead to a scientific model being changed or replaced. Before the discovery of the electron atoms were thought to be tiny spheres that could not be divided. The discovery of the electron led to the plum-pudding Describe how and why the atomic has changed over time. Describe the difference between the model of the atom and the nuclear model of the atom. Describe why the new evidence from the 1 Create a timeline for the history of the atomic Extended writing Describe the differences between the plum-pudding model, nuclear model and atomic model. Describe why changes to the atomic model happened. Model the plum-pudding model, nuclear model and atomic model. WS 1.1, 1.2
AQA-8464-SOW-ATOMIC.DOCX