PR-6171IRE Science A STEM Approach - 1st Class

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Lesson 3 Materials IT’S A STRETCH Teacher Notes Science Inquiry Focus: What happens when some materials are heated? Skills Development/Working Scientifically: • Questioning and predicting • Investigating and experimenting • Estimating and measuring • Analysing • Recording and communicating Science Learning Outcomes: • Pupils observe and describe the changes to playdough and chocolate when it is warmed. • Pupils use science to make jewellery. Technology/Engineering/Mathematics Links: • Using informal measurement to work out the approximate size of 1 cm. • Using a timer (electronic or stopwatch). • Designing a piece of jewellery. Background Information • Materials such as chocolate can be warmed and will melt as a result. They will take on the shape of whatever container they are in. • Materials such as playdough can be warmed (cooked in an oven) and will become hard as a result. Cooked playdough can no longer be twisted, stretched, bent or squashed. • Playdough jewellery activity . Assessment Focus: • Use the experiment worksheet on page 108 as a formative assessment of the pupil’s understanding of conducting an experiment. • Use the Venn diagram on page 109 as a formative assessment of the pupil’s ability to process and analyse experiment observations about how heat can change a material. Resources • Mini whiteboards for pairs of pupils • Playdough (from previous lesson) • Chocolate buttons • Toothpicks • Foil bun cases to place playdough balls and chocolate in • Baking trays • Toaster oven • Sufficient copies of pages 108 and 109 • String to make jewellery • Digital timer or stopwatch Viewing sample 106 Science: A STEM APPROACH 1st CLASS 978-1-912760-15-2 Prim-Ed Publishing – www.prim-ed.com
Materials IT’S A STRETCH Lesson 3 Teacher Notes Introduction: 1. Recall what was learnt about playdough and how it can change shape. In pairs, pupils use a mini whiteboard to list words describing playdough, as discovered in the previous lesson. Pupils then share with the whole class. Development: 2. Display a ball of playdough and a piece of chocolate at the front of the classroom. Using think-pairshare, pupils think about what would happen if the playdough and chocolate were placed in a hot oven. Individually, pupils use page 108 to write their prediction. 3. In pairs, pupils then conduct the experiment on page 108. Ensure pupils do not touch anything hot and remind them about using equipment safely. Pupils can set a timer using an electronic timer or stopwatch. 4. Once the playdough balls are cool to touch, and pupils have made their observations of the chocolate and playdough, they thread the playdough balls through a piece of string to create a necklace or bangle, which can later be decorated. Differentiation • Guided group work or individual support should be provided to ensure that all pupils have the opportunity to predict, observe and describe the changes to the playdough and chocolate. • Challenge: Provide children with names of other materials and ask them to predict what would happen to them if they were placed in a hot oven for ten minutes. Reflection: 5. Pupils share their results for the warming and cooling part of the experiment and discuss how the playdough changed when it was heated compared to how the chocolate changed. What shape was it? What shape is it now? What happened to the hole? Could you twist the playdough? Squash it? Can you make it go back to how it was before? Can you make the chocolate go back to its original shape? How? 6. In pairs, pupils construct a Venn diagram comparing the playdough and chocolate after it has been heated. Pupils can draw their own diagram based on the previous lesson (using the Venn diagram on the working wall), or use the template on page 109. Essentially, pupils should be able to state that playdough became hard and stayed in its ball shape, but the chocolate melted and changed shape. The hole stayed in the playdough, whereas in the chocolate the hole melted over. Viewing sample Prim-Ed Publishing – www.prim-ed.com 978-1-912760-15-2 1st Science: 107 CLASS A STEM APPROACH
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PR-6171IRE Science A STEM Approach - 1st Class

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