2.3.14 Worksheet Quick starter; Use the particle model Diffusion in liquids and gases Exploring driven by differences in to explain observations 2.3.14; Practical Slideshow: diffusion concentration involving diffusion sheet 2.3.14; Observing diffusion Diffusion in terms of the with bromine gas; Technician’s particle model notes 2.3.14 Interactive activity: Drag the items to the correct group – speeds up or slows down diffusion of particles; Hangman: Key vocabulary game 2.3.15 Worksheet Quick starter; Use the particle model Conservation of mass Conserving mass to explain the Law of 2.3.15; Practical Interactive activity: Changes of state Conservation of Mass sheet 2.3.15a; Which of the Conservation of material Practical sheet statements about and mass, and reversibility, 2.3.15b; chemical reactions in melting, freezing, are true, and which Technician’s evaporation, sublimation, notes 2.3.15 are false? condensation, dissolving 2.3.16 Deciding between Worksheet Quick starter; May be combined Use the particle model Mixtures, including dissolving physical and to explain the 2.3.16; Practical Slideshow: with lesson 2.3.17 The difference between chemical changes differences between sheet 2.3.16; Changes that are chemical and physical physical and chemical easily reversed and Technician’s changes changes notes 2.3.16 changes that are Recognise that mass is not easily reversed; conserved in all changes Interactive activity: Drag the change into the correct group physical or – chemical change?
2.3.14 Exploring diffusion Diffusion in liquids and gases driven by differences in concentration Diffusion in terms of the particle model Use the particle model to explain observations involving diffusion Worksheet 2.3.14; Practical sheet 2.3.14; Technician’s notes 2.3.14 Quick starter; Slideshow: Observing diffusion with bromine gas; Interactive activity: Drag the items to the correct group – speeds up or slows down diffusion of particles; Hangman: Key vocabulary game 2.3.15 Conserving mass Conservation of mass Changes of state Conservation of material and mass, and reversibility, in melting, freezing, evaporation, sublimation, condensation, dissolving Use the particle model to explain the Law of Conservation of Mass Worksheet 2.3.15; Practical sheet 2.3.15a; Practical sheet 2.3.15b; Technician’s notes 2.3.15 Quick starter; Interactive activity: Which of the statements about chemical reactions are true, and which are false? 2.3.16 Deciding between physical and chemical changes Mixtures, including dissolving The difference between chemical and physical changes Use the particle model to explain the differences between physical and chemical changes Recognise that mass is conserved in all changes Worksheet 2.3.16; Practical sheet 2.3.16; Technician’s notes 2.3.16 Quick starter; Slideshow: Changes that are easily reversed and changes that are not easily reversed; Interactive activity: Drag the change into the correct group – physical or chemical change? May be combined with lesson 2.3.17