Puddles on plastic 0 Overview Using this Resource Connecting to the Curriculum Marking Student Responses Further Resources This task is about what makes water dry up more quickly. Question 1Change answer On a sunny day in summer some students put two equal-sized sheets of plastic on the flat concrete outside their room. One sheet of plastic was white and the other was black. They poured a glass of water onto each sheet. The students saw that the water on the black plastic disappeared quickly, but the water on the white plastic stayed much longer. a) Explain what happened to the water on the black plastic. On a sunny day in summer some students put two equal-sized sheets of plastic on the flat concrete outside their room. One sheet of plastic was white and the other was black. They poured a glass of water onto each sheet. The students saw that the water on the black plastic disappeared quickly, but the water on the white plastic stayed much longer. a) Explain what happened to the water on the black plastic. Question 1Change answer b) Why did the water on the black plastic disappear more quickly than the water on the white plastic? b) Why did the water on the black plastic disappear more quickly than the water on the white plastic? Task administration: This task can be completed with pencil and paper or online. Level: 3 Curriculum info: Science, Knowledge, Physical World Keywords: physics concepts, energy, colour, heat, evaporation Description of task: Task: Describe what happens to water on black plastic and explain why. Assessment focus: effect of colour on heat retention. Answers/responses: Y6 (06/1998) a) The rain went up into the air as very small bits of water/into the air. or the rain evaporated into the air (dried by the sun). moderate b) The black plastic heated up faster/absorbs more heat (therefore evaporation occurs more quickly). moderate Dissolving sugar and salt Evaporation, condensation or neither? Is it evaporation or condensation? Where did the water go? Disappearing water The water cycle Investigating the water cycle The disappearing puddle Evaporating water
