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BRONZE AND BRASS




АAbout 6,000 years ago people discovered that copper could be made harder if mixed with tin. This alloy is called bronze. It was so widely used for many years that this period of time became known as the Bronze Age.
 
BTin was the fifth metal discovered by man. It is a soft whitish substance. Various proportions of the two metals produced different qualities in the bronze. Most early metal-workers used about eight parts of copper to one of tin. Because weapons made of bronze were harder and stronger than those of copper, tin became very important. However, there was little tin to be found in western Asia - still the centre of the metal-working world. Mostly it was found in Europe, and the merchants of Troy, who brought their goods to Europe, began loading their boats with tin on their return journeys. In England, tin was discovered and mined in Cornwall and was a main export for a long time.
 
CWhen zinc was discovered it was used to produce an important alloy in combination with copper. This alloy was brass, a hard-wearing, yellow metal which was valued more than bronze. The exact date of discovery is uncertain but it was probably about 200 BC.

1) В каком абзаце текста (A-C) рассказывается о:

1. металле, запасы которого можно было пополнить у купцов?

2. соединении из двух металлов, делающем оружие более крепким?

3. металле, давшем название времени?

4. неточности даты открытия металла?

5. основном пункте экспорта?


Найдите в тексте слова сходные по значению с данными ниже.

1. compound –

2. properties–

3. to find, to detect –

4. to combine–

5. to make, to manufacture –

6. certain –

Сопоставьте слова из двух колонок так, чтобы получить 5 выражений, употребляя каждое словосочетание только раз.

Verbs+Noun Preposition+Noun
1. use alloy 2. mix substance 3. make weapons 4. find tin 5. bring goods A__of bronze B__in Asia C__with tin D__to Europe E__for years

Вставьте пропущенное слово согласно информации, данной в тексте.

1. An alloy made of copper and tin is called _____.

2. Tin was the fifth metal ________________ by man.

3. Merchants of Troy loaded their boats with tin on their _____ journeys.

4. When zinc was discovered it was used to produce ____________ with copper.

5. Various proportions of the copper and tin produced different ______ in the bronze.

Найдите в тексте необходимую информацию и дайте ответы на вопросы, приведенные ниже.

1. What was discovered about 6,000 years ago?

2. Why did tin become more popular than copper?

3. Where was the center of the metal-working world?

4. Where was tin discovered in England?

5. What is brass?







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