Plastics
Today plastics have become important parts in modern life. Most of things around us contain plastics, or are made of plastics. Our blankets are made of nylon, a kind of plastics. The carpet is made of plastics. The ballpoints or pens we write with are made of plastics. The pans and pots we use to cook with, the toys the children play with, even the cars people drive, all have important plastics components. Do you work or plat with a computer? Some components of your computer are made of plastics.
Plastics have some advantages. They are relatively cheap to produce. Some plastics are made hard as stone and strong as steel. Some plastics are produced transparent as glass, light as wood, and elastics as rubber. Plastics are also produced in almost any colors. They are lightweight, waterproof, and chemical resistant.
However, plastics also have some disadvantages. When they are burned, some plastics produced poisonous smoke. Although certain plastics are designed to withstand temperatures as high as 288 degree Celcius, in general plastics are not used in extremely hot condition. The worst thing is that are not easily broken down into simpler components because of their molecular stability. As result, plastics can cause soil or water pollution.
Vocabulary Building
1. have become important parts = ..............
2. most of things around us = .............
3. contain plastics = ..............
4. our blankets = ..............
5. we write with = ...............
6. we use to cook with = ................
7. the toys the children play with = ...............
8. the cars people drive = ...............
9. have some advantages = ...............
10. ralatively cheap to produce = ...............
11. plastics are made hard as stone = ...............
12. transparent as glass = ...............
13. light as wood = ................
14. have some disadvantages = ................
15. when they are burned = .................
16.produce poisonous smoke = .................
17. not used in extremely hot condition = ...............
18. the worst thing = .................
19. as result = ................
20. cause soil or water pollution = ................
Answer the following questions.
1. Why are plastics important for modern life?
2. Look around you. What is made of plastics?
3. What are the advantages of plastics?
4. What are the disadvantages of plastics?
5. Why can plastics cause soil or water pollution?
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