Dissolving sugar II 0 Overview Using this Resource Connecting to the Curriculum Marking Student Responses Further Resources This task is about the surface area of a substance. Surface area is how much area of a substance is exposed to the outside. crushed grains of sugar grains of sugar sugar cube Question a) Which type of sugar has the most surface area? crushed grains of sugar grains of sugar sugar cube Question b) Which type of sugar would dissolve most quickly in water? crushed grains of sugar grains of sugar sugar cube Explain why the sugar you chose would dissolve most quickly. Task administration: This task can be completed with pencil and paper or online. Level: 4 Curriculum info: Science, Knowledge, Material World Keywords: changes, dissolving, surface area Description of task: Students select which type of sugar would dissolve fastest and explain why. 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 evidence/information to make decisions and provide explanations. Science capability: Use evidence (TKI) Science capabilities: Use evidence Making Better Sense: Dissolving Answers/responses: Y8 (10/1997) a) Crushed grains of sugar. very easy b) Crushed grains of sugar. very easy c) It has the smallest particles and therefore they mingle/mix/move more readily with the water particles/solvent to form a solution, or a greater surface area of the sugar is in contact with the water. easy Effect of surface area on evaporation rate Evaporating water
