Water facts 0 Overview Using this Resource Connecting to the Curriculum Marking Student Responses Working with Students This task is about changes of state of water. Question 1Change answer On a cool winter's morning Marama noticed that the steam coming from a boiling jug turned into water droplets on the kitchen window. a) Explain why the steam turned to water droplets on the window glass. On a cool winter's morning Marama noticed that the steam coming from a boiling jug turned into water droplets on the kitchen window. a) Explain why the steam turned to water droplets on the window glass. Question 1Change answer b) The process of steam turning into water is called b) The process of steam turning into water is called Question 1Change answer Marama had read a story about a stranded sailor. The sailor had survived by heating sea water. He held a cold piece of steel above the steaming water and collected the drops that formed on the steel. c) Why did the sailor do this to the sea water? Marama had read a story about a stranded sailor. The sailor had survived by heating sea water. He held a cold piece of steel above the steaming water and collected the drops that formed on the steel. c) Why did the sailor do this to the sea water? Copyright: (c) J.Fisher, 2013. Permission to use for educational purposes. Level: 4 Curriculum info: Science, Knowledge, Material World Keywords: changes of matter, changes of state, evaporation, condensation, distillation, water Description of task: Task: Answer three questions. Assessment focus: condensation. Answers/responses: Y8 (11/1998) a) An answer that shows an understanding that contact with the cold surface of the glass cools the steam and turns it into water. moderate b) Condensation. very difficult c) To get non-salty/pure water to drink. moderate Diagnostic and formative information: Response a) Because steam is water – 24% of students. Ask what makes the steam turn to water. b) Evaporation – 18% of students. c) To clean the water/to make it safe to drink – 16% of students. Ask students to explain further how the process achieves this.
