Методические указания и контрольное задание №5 по английскому языку для студентов заочного факультета специальностей 170600, 170700, 120100, 120200. Доржиева Г.Б - 21 стр.

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Tantalum is both hard and flexible. As a matter of fact, it is so
flexible that it can be easily drawn out into the finest wire.
Tantalum resists corrosion. That is why it is fit for lining
chemical apparatus.
Besides, it has a most important use in metallurgy. It is good
for making high-quality steels.
Of course, tantalum is still a rare and valuable metal, and so it
cannot be used widely.
2. Scan the text for information that answers the questions below:
1. Why is tantalum named after the hero of Greek mythology
hero?
2. Why is it difficult to get tantalum in a pure state?
3. Where can tantalum be used?
4. What are the properties of tantalum?
3. Match the following words and definitions:
a. withdraw 1. metal in the form of a thread
b. disrupt 2. similar cells and their products
produced by human beings.
c. fracture 3. the branch of medicine
d. tissue 4. to bother
e. wire 5. to be broken
f. surgery 6. to take away
g. irritate 7. to throw into disorder
4. Arrange the following sentences according to the logic of the
process of melting described in the text.
1. Tantalum is very useful in metallurgy.
2. Tantalum is suitable for lining chemical devices.
3. This chemical element was called after a hero of Greek
mythology.
4. This metal doesn’t irritate tissues during surgical
operations.
5. It is very difficult to obtain pure tantalum even now.
5. Discuss with your partner:
1. Why is tantalum a valuable metal?
2. Why do you think many chemical elements are called after
Greek mythology Gods and Heroes?
Text III.
I. Read the text using the words from the list:
Vocabulary list:
1. sample(n) – образец
2. nuisance(n) – чепуха
3. impurity(n) – зд. вкрапление
4. alloy(n) – сплав
5. resistance(n) – сопротивление
6. aircraft(n) – самолетостроение
NIOBIUM
Here is a short story about niobium or columbium. In 1801
Charles Hatchett, an English chemist, analyzed an ore sample
which had been sent to the British Museum from the United
States. He named it columbium after Christopher Columbus.
And the columbium-ore was given the name of columbite. 
   Tantalum is both hard and flexible. As a matter of fact, it is so      3. This chemical element was called after a hero of Greek
flexible that it can be easily drawn out into the finest wire.               mythology.
Tantalum resists corrosion. That is why it is fit for lining              4. This metal doesn’t irritate tissues during surgical
chemical apparatus.                                                          operations.
   Besides, it has a most important use in metallurgy. It is good         5. It is very difficult to obtain pure tantalum even now.
for making high-quality steels.
   Of course, tantalum is still a rare and valuable metal, and so it    5. Discuss with your partner:
cannot be used widely.
                                                                        1. Why is tantalum a valuable metal?
                                                                        2. Why do you think many chemical elements are called after
2. Scan the text for information that answers the questions below:         Greek mythology Gods and Heroes?

1. Why is tantalum named after the hero of Greek mythology
  hero?
2. Why is it difficult to get tantalum in a pure state?                                            Text III.
3. Where can tantalum be used?
4. What are the properties of tantalum?                                I. Read the text using the words from the list:

3. Match the following words and definitions:                                                  Vocabulary list:

a. withdraw            1. metal in the form of a thread                   1.   sample(n) – образец
b. disrupt             2. similar cells and their products                2.   nuisance(n) – чепуха
                        produced by human beings.                         3.   impurity(n) – зд. вкрапление
c. fracture            3. the branch of medicine                          4.   alloy(n) – сплав
d. tissue              4. to bother                                       5.   resistance(n) – сопротивление
e. wire                5. to be broken                                    6.   aircraft(n) – самолетостроение
f. surgery             6. to take away
g. irritate            7. to throw into disorder
                                                                                                  NIOBIUM
  4. Arrange the following sentences according to the logic of the
  process of melting described in the text.                               Here is a short story about niobium or columbium. In 1801
                                                                       Charles Hatchett, an English chemist, analyzed an ore sample
    1. Tantalum is very useful in metallurgy.                          which had been sent to the British Museum from the United
    2. Tantalum is suitable for lining chemical devices.               States. He named it columbium after Christopher Columbus.
                                                                       And the columbium-ore was given the name of columbite.

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