Acids and bases > glue

A glue can be made from milk by souring it using vinegar (an acid) which separates it into curds and whey. The curds can be neutralised by various bases to produce a variety of different glues. The glue can be tested for strength by sticking together two lolly sticks and attaching weights to them. This activity lends itself to group, investigative and competitive work.

This lesson sequence is designed to exemplify an approach to practical work that makes strong links with careers which use related skills and techniques.