1Pins are stuck along a metal strip with wax and one end of the strip is heated. What is seen after a short time? Do the pins fall, and why?
2Do all the pins fall at the same moment, or one after another? What does that teach us?
3When friends stand in a line and pass a stone from one end to the other, nobody leaves their place. When heat is transferred through a solid, do the molecules move from place to place in the same way?
4Why is the handle of a pot used for heating water or cooking covered on the outside with hard plastic?
5Why are cooking vessels made of copper, steel, iron or aluminium while their handles are made of wood or thermosetting plastic?
6Why does wearing a jacket make you feel warm?
7Why is a house built of mud cool in the summer and warm in the winter?
8Why do birds look fat on very cold days?
9Make a list of things used in daily life that are made the way they are because of how their material conducts heat, and write what each is used for.
10What is conduction? Give its definition and describe how it happens in a solid.
11How do diamond and graphite show that the idea "only metals are conductors" is wrong?
12A steel spoon and a wooden spoon are both left standing in a bowl of hot soup. After a while, which handle becomes hot, and why?