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V. Complete the gaps with the words given below.

The materials technology has … a lot over the past years. New more reliable materials have … the old ones. Other advances in mate­rials science may lead to further … in performance. Let's have a look at some examples of sport… .

Poles are often … from glass-fibre … that increase their … . Such poles are lighter and less … than … poles.

… and glass-fibre composites are also used for … hockey sticks. This helps to … stiffness. …, such hockey sticks can be … for players. That is why researchers are trying to … their performance.

Carbon-fibre composites have also replaced aluminium in tennis … . Such composite rackets have a higher … than aluminium … , so rackets can be even stiffer and … .

changed

performance

made

improvements

improve

equipment

carbon-fibre

replaced

aluminium

alloys

composites

producing

increase

dangerous

stiff

stiffness

lighter

rackets

however

VI. You are in the shop ”Sport Master”. You want to buy a modern hockey stick and a good tennis racket. Discuss with the shop assistant the best choice. Activity

I. Nowadays professional sportsmen want to have high-quality sports equipment in order to win different competitions. That is why the Belarusian Olympic Committee has decided to buy modern equipment for our Belarusian sportsmen. Divide into several groups.

Materials engineers: discuss what materials should be used in mak­ing the equipment for hockey players, tennis players and athletes. Present your ideas to the representatives of the Olympic Committee.

The Belarusian Olympic Committee: listen to the projects and choose the one you like most. Give your arguments.

II. Discussion. How much do we depend on plastics?

a) Read the following arguments and think of your own ones.

We cannot live without plastic

We can live without plastics

They soles of our shoes are made of plastics.

We can make leather shoes.

The photographic film is made of it.

b) Discuss this problem in groups of 4 and make your own decision.

Writing

I. Study the diagram and write a paragraph about the appli­cations of different types of plastics. Point out why these products are made of plastic.

II. Translate the passage into Ukrainian. Use the dictionary if necessary.

Despite well-grounded criticism, plastics possess numerous advantages. The most important of them is certainly energy conser­vation. Here are some simple examples.

Food must be kept fresh and healthy. In fact, each pound of plas­tic packaging reduces up to 1.7 pounds of food waste. Besides, plas­tics make packaging more efficient, which ultimately conserves resources. For example, you need 2 pounds of plastic for the delivery of 1,000 ounces of juice. You will have to use 3 pounds of aluminum, 8 pounds of steel or 27 pounds of glass for the same amount of juice. Plastics also help conserve energy in your home. Vinyl windows lower your heating and cooling bills. Plastic parts and insulation help major appliances – like refrigerators or dishwashers – resist corro­sion, last longer and operate more efficiently. Indeed, their energy efficiency has improved by 50 percent since the 1970s. Health, safe­ty, high performance – plastics help make these things possible.

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