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III. That's how we can begin a phrase in English. Study this table.

Opening words and phrases.

On the one hand

On the other hand

Anyway

In any case

On the whole

Fortunately

Luckily

Unfortunately

Actually

Well

So

Thus

By the way

You know

You see

As a matter of fact

IV. Complete the dialogues. Use the opening words and phrases from the tale above.

– Look here, … . I bet that … is very heavy! – I'm sure it is not! – Hmm, … what material …? –…, to my mind … . –… not! Can't you see?! It's made of … . – … strong? – Well, on the one hand, it is … than … . On …, it is less … than … .

Language Practice

I. Complete the table.

Example:

long – longer – the longest

long – less long – the least long

rigid – more rigid – the most rigid

rigid – less rigid – the least rigid

strong – … – …

heavy – … – …

hard – … – …

soft – … – …

cheap – … – …

plastic – … – …

elastic – … – …

brittle – … – …

flexible – … – …

expensive – … – …

valuable - … - …

II. Compare the properties of different substances.

Example 1: plastic – weak rubber – ? Rubber is weaker than plastic.

  1. plastic – strong metal – ?

  2. aluminium – hard copper – ?

  3. aluminium – light rubber – ?

  4. cast iron – soft aluminium – ?

Example 2: plastic – flexible rubber – ? Rubber is more flexible than plastic.

  1. rubber – rigid steel – ?

  2. wood – brittle glass – ?

  3. steel – plastic copper – ?

  4. steel – elastic rubber – ?

III. Complete the sentences with these words: rigid, soft, elastic, hard, brittle, expensive, valuable. Translate them into Russian.

  1. Gold is the … … of the metals.

  2. Glass is … … than cast iron.

  3. This tank is the … one because it is made of steel.

  4. This material is the … … of these new materials.

  5. The … of these materials is aluminium.

  6. Copper is … than rubber.

  7. This metal is more … than iron.

IV. Complete the table with the nouns for each property.

Properties of Materials

Adjective

Nouns

flexible

hard

soft

plastic

elastic

light

strong

flexibility

V. Rephrase the following sentences. The table above will help you.

Example: material / flexible This material is very flexible. It has the property of flexibility.

  1. glass / hard

  2. aluminium / soft

  3. copper / plastic

  4. steel / elastic

  5. aluminium / light

VI. Correct mistakes in the given sentences.

  1. This pipe is made of plastic because it's a rigider material than rubber.

  2. Rubber is the most elastic than steel.

  3. Metal is more stronger than plastic.

  4. Glass is brittler than wood.

  5. This tank is the harder one because it's made of steel.

  6. This material is very flexible than that one.

  7. What material this pipe is made of?

  8. Copper is harder then alluminium.

VII. Translate the following sentences into English using your active vocabulary.

  1. Этот материал самый ценный из всех материалов.

  2. Мне кажется, эти трубы – легкие, потому что они сделаны из пластика.

  3. С одной стороны, пластик – менее гибкий материал, чем резина, но с другой стороны он – самый легкий и наименее дорогой материал.

  4. Он обладает свойством пластичности, поэтому этот материал широко используется.

  5. Литейный чугун – тяжелый, но он легче, чем медь.

  6. Стальные трубы – самые тяжелые и наименее гибкие.

  7. Медь и алюминий легче, чем литейный чугун и стекло, но более твердые, чем резина.

  8. Эти пружины сделаны из стали, потому что сталь – эластичный металл.

  9. Стекло – очень хрупкий материал.

  10. Сталь – самый эластичный материал из всех этих материалов.

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