Нужно ответить на вопросы. 1. Give the opposites for: rigid - , hard -, weak -, conductive -. 2. What types of materials do you know? Give the examples. 3. What metals do you know? Name their properties. 4. What materials are flexible? Hard? Rigid? 5. What is a composite? Give some examples. 6. How can you test glass? How can you test plastic? 7. What is an alloy? How can you test alloy? Give some examples of alloys. 8. What is fiberglass? What are the properties of fiberglass 9. What materials in construction do you know? What are the properties of timber? 10. What is ferrous metal? What is nonferrous metal? 11. How can you test rubber? Is it pure material or a composite? 13. Translate the following words: to break, to melt, conductive. 14. Translate the following words: properties, flexible, conductive. 15. Translate the following words: tough, brittle, to solute. 16. What is mild steel? What is alloy steel? What is high- speed steel and where is it used?

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