Jimmy discovers the secret to making prawn crackers. Prawn Crackers have been handmade in Asia for generations from a mixture of prawn puree and tapioca dough. The tapioca flour contains starch which gives the crackers their crunch. But to produce prawn crackers on an industrial scale, food factories speed things up using massive amounts of pressure in a machine called an extruder.
Could be used to explore how the properties of ingredients can be used to make industrial processes more efficient than traditional methods.
The clip explains how the properties of the starch are exploited to achieve the light and crisp texture in prawn crackers. The teacher might use the clip to explore the scientific properties of starch (and other components of food) and how these can be transformed though heat and pressure.