Material Classification Assignment

• Read pp. 67 to 70 in "Experience Technology" , Sowman &Swernofsky, ISBN 0-02-646945-6
• Answer the following questions and hand them in.

1. Materials are divided into four main categories. Name them.
2. How is wood subdivided into two main categories?
3. What is a ferrous metal?
4. What elements is steel composed of?
5. What element is added or increased in steel to make it harder?
6. What elements are added or increased in steel to make it stainless steel?
7. What is an Alloy?
8. Name three nonferrous metals.
9. What type of material do you think glass is?
10. What is the difference between a thermoplastic polymer and a thermoset polymer?
11. What is a composite material?