- •The precious envelope
- •1. Warning up.
- •2. Listen to or look through the following text and say what answers you've just discussed are not in it.
- •3. Look through the text again and find all the definitions connected with air.
- •4. A) Look through the text once more and change the given questions to the order of events they occur in the text:
- •5. Listen to or read the given extracts of critical reviews of the book "Air" and decide if they are positive (p) or negative (n):
- •6. Read the text thoroughly with a dictionary and answer the following questions. Use your knowledge of chemistry as well.
- •7. Using a dictionary, find in the text English equivalents to the following Russian words, word combinations and chemical terms:
- •8. Match the words, word combinations and chemical terms in a with their synonyms in b:
- •9. Complete the following sentences using the words from the list below. Some of the words can be used more than once:
- •10. Complete the other sentences, this time using chemical terms from the list below. Some of them can't be used in the given sentences, while the others can be used a few times:
- •11. A) Find in ex. 2 and ex. 5 all the sentences containing infinitive, participle (I and II) and gerund. Translate these sentences into Russian.
- •12. Listen to the following dialogue and say what problems the participants are discussing. The notes and words will help you to understand the text better: notes
- •17. A) Read the text again and state which of the following statements are true (t), false (f) or not mentioned (nm) in the text:
- •18. Read the text again, divide it into logical parts and entitle them thus making a plan. Write out the sentences expressing the main idea(s) of the text.
- •19. Write a summary of the text using your plan and the sentences you've written out.
17. A) Read the text again and state which of the following statements are true (t), false (f) or not mentioned (nm) in the text:
1. There are many elements that are more important than oxygen.
2. Oxygen is very reactive.
3. Oxygen is a bluish coloured gas.
4. The amount of heat liberated on oxidation doesn't depend on the rate of oxidation.
5. Combinations with oxygen seldom liberate heat.
6. Liquid oxygen boils at — 185.5°C.
b) Using the following expressions agree or disagree with the given statements. Work in pairs: one student translates the statement and says it out loud, the other agrees or disagrees. Take turns. The list of expressions comes handy:
Agreement: Disagreement:
That's right. You're not right, I'm afraid.
You're quite right. Not quite right.
Fine. Just the opposite, I'm afraid.
True. Just on the contrary, I'm afraid.
Quite true. It's not quite so.
Right. I can't quite agree with you here.
Quite right. You're wrong, I'm afraid.
1. Насколько я знаю, азот и фосфор являются самыми важными элементами в группе VI.
2. В лекции было сказано, что при нормальных условиях азот представляет собой газ, состоящий из двухатомных молекул.
3. Известно, что азот составляет приблизительно 60 процентов всего объема атмосферы.
4. Никто не знает, что процесс превращения атмосферного азота в форму, усваиваемую растениями и животными, называется фиксацией азота.
5. И хочу добавить, что этот процесс является составной частью круговорота азота в природе.
6. Я где-то читал, что ежегодно в мире вырабатывается свыше 100 млн тонн азота.
7. Это правда, что фосфор является самым незаменимым для жизни элементом и входит в состав почти всех живых организмов?
8. Насколько я понимаю, фосфор необходим животным для построения костных тканей и обеспечения организма энергией в процессе дыхания.
9. Красный фосфор используется для изготовления спичек, не так ли?
10. Следует отметить, что фосфор входит в состав всех минералов, важнейшим из которых является апатит.