| Hinges shatters shelving transparent Shards toughened interesting |
Glass can be used as an ____________material in its own right, rather than simply being a practical choice of _________ material for windows. Glass has many uses such as for ________, work surfaces and splashbacks, doors, screens and wall panels. For any interior application, ________ or tempered glass should be specified. Such glass has been made safer by heat treating. This makes it around five times stronger, but it also affects Fig.16. Glass has many uses in construction
the properties of the glass. When it is broken it _________in small square fragments, which are unlikely to injure in comparison with long _________. However, after heat treatment, the glass cannot be cut or worked, so any drilling or cutting required for _________ and handles must be done before that.
Exercise 42. Answer the questions.
1. Is glass used only as transparent material for windows?
2. Where can glass be applied?
3. Should glass be specified for interior application?
4. What makes glass safer?
5. Can glass be cut or worked after heat treatment?
Exercise 43. Match the beginning of the sentence to its ending.
| 1. Transparent material 2. Glass is used for 3. Tempered glass should be 4. Five times 5. Properties of the 6. The glass cannot be | A. Work surfaces and splashbacks. B. Cut or worked. C. Glass. D. For windows. E. Specified. F. Stronger. |
Exercise 44. Put the words in the correct order to make sentences.
1. an / material / be / interesting / glass/ as / can / used
2. be / specified / glass/ should / tempered
3. affects / also / it / the / glass / the / properties / of
4. be / done / drilling / must / or / treatment / before / cutting / heat / the
Exercise 45. Use a dictionary to find all the definitions of the word glass and make up sentences to show all their meanings.
Exercise 46. Complete the crossword using the words from this Unit.
Across
1. A chemical element that is a redbrown metal.
3. Able to be used in many different ways.
7. A type of white or grey stone containing calcium, used for building and making cement.
9. A grey powder made from lime and clay that becomes hard when it is mixed with water and allowed to dry, and that is used in building.
10. A hard clear substance used for making objects such as windows or bottles.
14. To use something new or different instead of what is normally used.
Down
1. A type of heavy wet soil that becomes hard when it is baked in a kiln, used for making cups, plates and other objects.
2. Allowing liquid, air etc. to pass slowly through many very small holes.
4. Solid substances from which things can be made.
5. Stiff, hard and difficult to bend or move.
6. A strong metal made from a mixture of iron and carbon.
8. An artificial material used to make cloth.
11. Wood prepared for use in building and carpentry.
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12. An object or substance that is clear or thin enough for you to see things through.
13. The quality of being strong and not easy to break.
15. Causing little or no damage to the environment and therefore existing for a long time.
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