Represent atoms, molecules of whether a chemical is an element or elements and simple compounds using not, and a metal or a non-metal. a model. Students then swap their keys with Exceeding other groups to be ‘road-tested’. Write simple chemical formulae from molecular structures. Lesson 7He: Chemical reactions Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing Starter: Different changes Exploring: Resources n/a Students carry Recall examples of chemical Demonstrate the difference between a Household from 7He out a set of reactions in everyday life. chemical and a physical change and how reactions Exploring experiments Recall some observations that one is easier to reverse than the other, Students should Science. using mainly indicate a chemical reaction. by burning a match and bending a match be able to household Identify the products and reactants (use long matches, and do not break categorise the chemicals. using a word equation. them). Then demonstrate folding a piece chemical Supply missing reactants or of cotton or wool fabric and burning it. reactions – products to complete a word Ask students to describe the difference needing or not equation. between the changes. needing energy Identify thermal decomposition to start them off, reactions. Exploring: Household reactions reversible or not, Securing Provide simple instruction cards for undergo physical Model simple reactions using word students to carry out a set of and chemical equations. experiments using mainly household change or just Recall examples of energy being chemicals. Students decide whether chemical change, used to start a chemical reaction or there is no reaction, a reversible or an etc. keep it going. irreversible change and state if a change Describe what happens during is physical or chemical and explain why. thermal decomposition of a metal carbonate. Explaining: Word equations 2 Name compounds that contain two Use some of the simpler chemical elements plus oxygen. reactions to introduce the terms for Exceeding reactants and products and explain how Apply knowledge of thermal reactions can be described by using word decomposition in carbonates to equations. other compounds.
Represent atoms, molecules of elements and simple compounds using a model. Exceeding Write simple chemical formulae from molecular structures. whether a chemical is an element or not, and a metal or a non-metal. Students then swap their keys with other groups to be ‘road-tested’. Lesson 7He: Chemical reactions Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing Recall examples of chemical reactions in everyday life. Recall some observations that indicate a chemical reaction. Identify the products and reactants using a word equation. Supply missing reactants or products to complete a word equation. Identify thermal decomposition reactions. Securing Model simple reactions using word equations. Recall examples of energy being used to start a chemical reaction or keep it going. Describe what happens during thermal decomposition of a metal carbonate. Name compounds that contain two elements plus oxygen. Exceeding Apply knowledge of thermal decomposition in carbonates to other compounds. Starter: Different changes Demonstrate the difference between a chemical and a physical change and how one is easier to reverse than the other, by burning a match and bending a match (use long matches, and do not break them). Then demonstrate folding a piece of cotton or wool fabric and burning it. Ask students to describe the difference between the changes. Exploring: Household reactions Provide simple instruction cards for students to carry out a set of experiments using mainly household chemicals. Students decide whether there is no reaction, a reversible or an irreversible change and state if a change is physical or chemical and explain why. Explaining: Word equations 2 Use some of the simpler chemical reactions to introduce the terms for reactants and products and explain how reactions can be described by using word equations. Exploring: Household reactions Students should be able to categorise the chemical reactions – needing or not needing energy to start them off, reversible or not, undergo physical and chemical change or just chemical change, etc. Resources from 7He Exploring Science. n/a Students carry out a set of experiments using mainly household chemicals.
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