They then investigated conduction using a conductivity star which comprises of four different metals that have a drawing pin attached to them using wax. When the star is placed over a flame then the heat is conducted at different rates depending on the metal. The best conductor is the one which ‘drops’ the drawing pin first since the wax has melted the quickest.
Year 7 also rounded off their study of ‘Energy’ by trying to explain just how the amazing ‘Stirling Engine’ actually works…it is powered by temperature difference and so can actually run when ‘powered’ by ice!
