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Answers for “Flawed Beauty” with explanations

Answers for “The effects of light on plant and animals species” with explanations

Answers for “The Impact of Wilderness Tourism” with explanations

Question 14-17:
14. G (para 2, last 3 lines: ―officer at Pilkington. But he insists that cases are few and far
between. ‗It’s a very rare phenomenon,‗ he says‖)

15. A (para 3, last 5 lines: ―of hundreds of cases. ‗What you hear is only the tip of the
iceberg,‗ says Trevor Ford, a glass expert at Resolve Engineering in Brisbane.
Queensland. He believes the reason is simple: ‗No-one wants bad press.‖)

16. H (para 8, line 10-16: ―speeded up. Ironically, says Graham Dodd, of consulting
engineers Arup in London, the oldest pane of toughened glass known to have failed due
to nickel sulphide inclusions was in Pilkington‘s glass research building in Lathom,
Lancashire. The pane was 27 years old.‖)

17. C (para 10, line 7-10: ―were finally called in. John Barry, an expert in nickel sulphide
contamination at the University of Queensland, analysed every glass pane in the building.
Using a studio‖)

Question 18-23:
18. F – sharp (para 4, line 4-8: ―the world. It’s easy to see why. This glass has five times the
strength of standard glass, and when it does break it shatters into tiny cubes rather than
large, razor-sharp shards. Architects love it because large‖)

19. I – unexpectedly (para 1, line 3-5: ―pane of toughened glass in the roof of a shopping
centre at Bishops walk shattered without warning and fell from its frame‖)

20. C – quickly

21. K – contracts
(para 5, first 6 lines: ―It is made by heating a sheet of ordinary glass to about 620°C to
soften it slightly, allowing its structure to expand, and then cooling it rapidly with jets of
cold air. This causes the outer layer of the pane to contract and solidify before the

22. E – warm (para 6, first 8 lines: ―The problem starts when glass contains nickel sulphide
impurities. Trace amounts or nickel and sulphur are usually present in the raw materials
used to make glass, and nickel can also be introduced by fragments of nickel alloys
tailing into the molten glass. As the glass is heated, these atoms react to 8° form tiny
crystals of nickel sulphide. Just a‖)

23. L – disputed

Question 24-26:
24. TRUE (para 2, last 3 lines: ―officer at Pilkington. But he insists that cases are few and far
between. ‗It’s a very rare phenomenon,‗ he says.‖)


26. FALSE (para 9, first 3 lines: ―Data showing the scale of the nickel sulphide problem is
almost impossible to find. The picture is made more complicated‖)

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