Cleaning the grater 0 Overview Using this Resource Connecting to the Curriculum Marking Student Responses Further Resources This task is about how lemon juice can change the surface of metal. Question 1Change answer Sarah spilt lemon juice on a metal grater. She noticed that where the juice had been made the grater shiny. Explain why the metal became shiny. Sarah spilt lemon juice on a metal grater. She noticed that where the juice had been made the grater shiny. Explain why the metal became shiny. Task administration: This task can be completed with pencil and paper or online. Level: 5 Curriculum info: Science, Knowledge, Material World Keywords: properties, acids Description of task: Students explain why the metal where some lemon juice had been spilt appears shiny. Answers/responses: Y9 (11/1996) Lemon juice is acidic. It reacts with the oxide layer exposing the (shiny) metal underneath. easy Acids and bases II Acid, alkali or neutral The meaning of pH Acids and bases Acidic, basic, or neutral
