XV. Read the following word – combinations and find the sentences with them. Translate into Russian.

to weigh substances, branches of chemistry, to attend lectures, to be equipped with special apparatus, practical classes, chemical properties, exact amount, to record the yield, at the end of the reaction, to observe the reaction.

 XVI. Make the interrogative sentences using the Past Continuous tense.

1. He is weighing the substances at the laboratory.

Where ___________________________?

2. They are reading an interesting book.

Are ____________________________?

3. The students are using special apparatus.

What ___________________________?

4. I am helping the teacher to record the yield.

Whom _________________________?

5. You are observing the reaction.

What _________________________?

XVII. Translate the following sentences using the Present Continuous tense:

1. Что вы сейчас делаете? – Я изучаю свойства элементов.

2. Кто стоит у доски? – Преподаватель.

3. Студенты сидят и регистрируют результат реакции.

4. Вы идете в химическую лабораторию? - Нет.

5. Куда вы идете? - Я иду в библиотеку

XVIII. Give the antonyms of the following words:

light, large, liquid, disagreeable, harmful.

XIX.Translate the following sentences:

a) The bottle is behind the crucible.

What is there in front of the test-tube stand?

Is there a beaker on the shelf?

There is a test-tube on the bench.

There is the Periodic Table on the wall.

There is no filter-stand in the lab.

b) В нашей химической лаборатории имеются столы и полки.

На лабораторном столе находятся три горелки.

На столе нет весов.

На полке находятся мензурки и воронки.

Есть ли на столе штатив для пробирок.

XX. Describe your own chemical laboratory.

Key words and expressions:

Our chemical laboratory is very light and...

There are shelves,...

You can see many things like... on the table

There is (are) … on the wall (shelves)

XXI. Answer the questions.

1. Where do medical students have their practical classes on Chemistry?

2. How many benches are there in your laboratory?

3. What can one see on the walls of the laboratory?

4. What is in every chemical laboratory?

5. What apparatus do the students use in laboratory?

6. What do the students obtain?

7. What do the students use scales, crucibles, and burners for?

8. What do the students record at the end of each reaction?

XXII. Make the plan of retelling the text.

XXIII. Speak on the following topics.

1. My chemical laboratory.

2. Practical classes.

3. Interesting experiments.

XXIV. Retell the text.

Lesson III

My first experiment

 The rules of reading: the letter Xx;

Grammar: Future Continuous tense

Text: My First Experiment

                                  

Assignments to do:

Remember:

The reading of the letter Xx

a) the letter Xx is pronounced as [ gz ] before shock vowel sound;               

e.g.: exam, exit

b) the letter Xx is pronounced as [ ks ] in other cases;

e.g.: text, next

 

I. Read the following words according to the rules of reading of the letter «Xx»:

exact, exercise, exit, mix, X-ray, extract, exist, mixture, textbook, textile, oxen, example, box, six, expansion.

 

II. Put down the words into 2 columns: the words with the sounds [gz], [kz].

axe, axis, example, waxy, experiment, excuse, exhibit, fox, maximum, mix, fax, exist, external, wax.

 

Remind Grammar (look at grammar reference)

II. Answer the questions.

1. What is the formula of the Future Continuous Tense?

2. When do we use the Future Continuous Tense?

3. How do we form the participle I of the verbs?

4. What is the conjugation of the verb “to be” in the Future tense?

 

IV. Translate the following verbs and give the Participle I of them:

to conduct, to obtain, to use, to weigh, to burn, to begin, to observe, to record

V. Put the verbs in brackets into the Future Continuous tense.

1. He..... this book at 7 o'clock (to read)

2. My sister..... the report at 2 o'clock (to write)

3. We..... the text at about 6 o'clock (to translate)

4. I..... TV at 9 o'clock in the evening (to watch)

5. Ann..... at 7 o'clock in the morning (to sleep)

6. They … their practical classes on chemistry tomorrow at 9 o’clock (to have)