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

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Lesson 5 Materials IT’S A STRETCH Teacher Notes Science Inquiry Focus: What other physical changes can be made to an object? Does an object go back to its original shape after a change is made or does it stay changed? Skills Development/Working Scientifically: • Questioning and predicting • Investigating and experimenting • Estimating and measuring • Analysing • Recording and communicating Science Learning Outcomes: • Pupils observe sounds to determine what action is being made. • Pupils observe and describe changes that can be made to a cracker biscuit. Technology/Engineering/Mathematics Links: • Participating in an online quiz. • Observing digital audio files. • Understanding one half of an object. Background Information • Materials and objects can change shape, size, colour and temperature. • Materials can be changed in a variety of physical ways such as bending, stretching, squashing, crushing, breaking, cutting, warming and cooling. • Some examples of physical changes include crushing a can or plastic bottle, breaking a glass, shredding paper, chopping wood, crumpling a paper bag, dicing vegetables and mixing crackers with water. Assessment Focus: • Use the experiment sheet on page 116 as a formative assessment of the pupil’s ability to plan and conduct a procedure and use digital technologies to record before and after observations. • Use Step 8 as a formative assessment of the pupil’s understanding that many physical actions can cause an object or material to change, and they cannot be changed back to their original shape. Resources • Changes to materials quiz • Sound effects website • Water crackers (or similar) • Water and droppers • Sandwich bags • Novelty ice cube trays • Digital camera device • Sufficient copies of page 116 Viewing sample 114 Science: A STEM APPROACH 1st CLASS 978-1-912760-15-2 Prim-Ed Publishing – www.prim-ed.com
Materials IT’S A STRETCH Lesson 5 Lesson Plan Introduction: 1. Revise with pupils what actions can change a material by answering the Studyladder quiz (free subscription) questions at , or create a simple true or false quiz that covers previous learning in this unit of work. 2. Pupils brainstorm in pairs what other actions they can think of that will change a material. Does it stay changed? Does it go back to its original shape? Development: 3. Explore other actions by listening to some audio files at using the search terms ‘plastic bottle crush’, ‘mirror shattering’, ‘plastic wrinkling’, ‘tearing paper’ and ‘chopping wood’. Play to pupils and ask them to guess what action is making the sound. Be careful not to show the website on the whiteboard as this will give away the answer. 4. Pupils explore other actions that cause a change by conducting the guided experiment on page 116. Give each pupil a sandwich bag with one large water cracker in it. Pupils make changes to the water cracker to observe how the shape changes. 5. Ensure pupils do not add too much water as this will affect drying time. This lesson can be conducted over two sessions to allow for the crackers to dry completely. Continue the lesson from the What did happen section of the experiment on page 116. 6. Pupils print out their before and after photographs of the cracker. Differentiation • Most pupils should be able to complete the cracker experiment independently or in small groups following the step by step instructions. Adults can support through guided group work where necessary. • Challenge pupils to discuss and then compile a list of materials or objects that do not return to their original shapes after changes have been made. Reflection: 7. Pupils share their results with a partner and compare their final water cracker shapes and photographs. 8. Individually, pupils glue their photographs into their science books and write a sentence about the changes that were made for the cracker to go from the before photograph to the after photograph. Viewing sample Prim-Ed Publishing – www.prim-ed.com 978-1-912760-15-2 1st Science: 115 CLASS A STEM APPROACH
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PR-6171IRE Science A STEM Approach - 1st Class

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