Cooking changes things 0 Overview Using this Resource Connecting to the Curriculum Marking Student Responses Further Resources This task is about physical and chemical changes. Cooking can change food and drinks. A physical change is reversible and no new substance is made. A chemical change is not reversible and a new substance is made. Question 1Change answer Below are some changes that can happen during cooking. Classify each as a chemical or physical change. Below are some changes that can happen during cooking. Classify each as a chemical or physical change. a) Breaking eggs: chemical changephysical changechemical changephysical change b) Hard boiling an egg: chemical changephysical changechemical changephysical change c) Melting butter: chemical changephysical changechemical changephysical change d) Stirring milk into hot coffee: chemical changephysical changechemical changephysical change e) Baking biscuits: chemical changephysical changechemical changephysical change Task administration: This task can be completed with pencil and paper or online with auto-marking. Level: 5 Curriculum info: Science, Knowledge, Material World Keywords: changes, eggs Description of task: Students classify five described changes as either a chemical or a physical change. Curriculum Links: Science capabilities The capabilities focus is brought about by the conversations you have and the questions you ask. Capability: Use evidence This resource provides opportunities to discuss using criteria to make a decision to answer a question. Science capability: Use evidence Science capabilities: Use evidence Answers/responses: Y10 (07/1999) a) b) c) d) e) Physical Chemical Physical Chemical Chemical all correct – very difficult 4 correct – moderate 3 correct – easy Lemon juice reactions A winters day
