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2. Answer the following questions.

1. How did Triplex get its name and what does it consist of?

2. Where is Triplex used and why?

3. How is toughened glass produced and what are its properties?

4. Where is toughened glass used?

3. Match the words in A with corresponding definition in B.

	A		B
1.	glass	A.	if you see or view something through rose-coloured glasses, you think it is better than it really is.
2.	glasshouse	B.	has been given a rough surface, so that it is not transparent.
3.	glassy	C.	smooth and shining, like glass.
4.	plate glass	D.	a building made mainly of glass which is used for growing plants.
5.	frosted glass	E.	a transparent material, a transparent solid substance used for making windows, bottles.
6.	rose-coloured glasses	F.	big pieces of glass made in large thick sheets, used especially in shop windows.

Put each of the following words in its correct place in the passage below.

glass glasshouse glassy

plate glass frosted glass

1. A ____________ stone beloved by ancient toolmakers, obsidian was found only in two prehistoric spots in Arizona prior to the 1980s.

2. Bow-tie pins of enamel and sapphires sparkled behind ____________ set into black walls.

3. If you want to watch the woodlice, rest the sheet of ____________ directly on the top of the pot.

4. On Halloween, children come and paint the ____________ window.

5. One of the first examples of a curvilinear ____________, it stands as a reminder of bygone eras in Belfast’s history.

6. The front door was open, revealing a stone-flagged porch, and an inner door with ____________ in the top half.

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