Exercise 19. Grammar test. Exercise 18. Discuss the following issues

Exercise 18. Discuss the following issues.

Exercise 17. Decide if the statements below are true or false.

Exercise 16. Find in the text synonyms for the following words.

Exercise 15. Give English equivalents for the following words and word combinations.

Сформулювати гіпотезу; той, що неможливо поділити; недостатньо розтлумачені; потрібно було, щоб гіпотеза була підтверджена; прийняти як факт; елементарні частинки; коли відбувається хімічна реакція; це – дійсно мало; будь-що інше; одна десятитисячна; простір, що тягнеться по діаметру у декілька ангстремів навколо ядра; ефективно заповнювати простір.

To name; easy; interpretation; to check; type; to contain; significant; building; tiny; volume; component; weighty; really; large; structure; to near; fast; method; advance; learning; indication; innumerable.

1. The Greek word “atom” means invisible.

2. Atoms are the structural units of some substances.

3. Each atom consists of at least two constituents.

4. If a matter has a great density, its nuclei are packed together side by side.

5. The diameter of a nucleus is one million-millionth of the atom’s diameter.

1. What would you do if the atomic theory were not verified yet? 2. What would you do if the hypothesis concerning the atomic structure of matter were not accepted yet by scientists? 3. What would you do if the atomic theory were unsatisfactorily explained? 4. What would you do if the relations among the weights of substances taking part in chemical reactions were only observed?
5. What would you do if you were interested in the problem of sub-atomic particles? 6. What would have happened if the hypothesis by John Dalton hadn’t been verified? 7. What would have happened if scientists hadn't been confirmed by further work in chemistry and physics? 8. What would have happened if a piece of rock had been magnified to the size of the earth? 9. What would have happened if nuclei could be packed together side by side? 10. What would have happened if the progress of scientific knowledge about atoms hadn't been so rapid?

1. I wish you would have called.

a. You called.

b. You didn’t call.

2. If I have money, I buy English books.

a. I always do it.

b. I do this when I have money.

3. If she had studied for her test, I’m sure she would have done quite well.

a. She didn’t study.

b. She studied.

4. If Mary had been at the office, she would have helped you.

a. Mary helped you.

b. Mary didn’t help you.

5. You could have got a higher score.

a. You didn’t get a high score because you didn’t study.

b. You got a high score because you studied.

6. They could have finished the project on time.

a. They had the ability to be quicker.

b. They finished the project on time.

7. Let’s pretend that we have this opportunity.

a. We have the opportunity.

b. We don’t have the opportunity.

8. I wish you had come back.

a. You did not come.

b. You came.

9. If you had done your homework, you would have got an excellent mark.

a. You didn’t get an excellent mark because you didn’t do your homework.

b. You did your homework, and so you got an excellent mark.

10. You could have taken a friend to the party.

a. You came alone.

b. You came with a friend.

11. I wish that you liked the meeting.

a. You didn’t like the meeting.

b. There is a possibility that you like the meeting.

12. I hope that you enjoyed the party.

a. You didn’t enjoy the party.

b. There is actually possibility that you liked the party.

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