4. Trace the changes that cotton must undergo before it is suitable for wearing as a dress or a pair of stockings.
5. Trace the changes that wool undergoes before it can be worn as a sweater or a winter coat.
6. Trace the changes that the skins of animals undergo before they can be worn as a muff.
7. Trace the changes that silk undergoes before it can be worn as a neck-tie.
8. Trace the changes that hemp undergoes before it can be used as a rope.
9. Trace the changes that hides undergo before they can be worn as shoes.
10. Trace wood from the tree to a piece of fine furniture or to the case of a musical instrument.
11. Trace the steps in the process of making maple sugar.
12. Trace the steps in making a piece of glazed pottery.
13. Trace clay to bricks.