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Making and testing home-made glues (pt 1/ 2)
Jem Stansfield from the BBC One series 'Bang Goes The Theory' demonstrates how sticky a homemade glue can be by hanging upside down above water. He then explains how adhesives rely on electrostatic forces, and are capable of joining two rough surfaces by filling the gap between them, and allowing sufficient contact to allow electrostatic attraction. Jem makes some more glues from toffees, milk and table tennis balls. He describes how he plans to test them using the help of the other 'Bang Goes the Theory' presenters.
First broadcast on BBC One on 'Bang Goes the Theory'.
Could be used as an introduction to a practical activity in which students make some adhesives and design a way to test them. Students could research other 'sticky' substances such as cling film, gecko feet and velcro. This clip could be used in conjunction with 13201. This clip accompanies a BBC Teachers' Pack to support Series 3 and 4 of 'Bang Goes The Theory'. The pack can be downloaded from bbc.co.uk/schools/teachers/bang/
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