VI. Put the verbs in brackets into the Present Continuous tense.

Make these sentences positive, negative and interrogative.

1. I (to sit) in class.

2. It (to rain).

3. The sun (to shine).

4. I (to wear) jeans.

5. My parents (to work).

VII. Make the following sentences negative and interrogative and translate them:

1. Jack is opening the window.

2. Sally is cleaning her teeth.

3. My mother is cooking the meal.

4. My father is reading the magazine.

5. She is sweeping the floor.

VIII. Read and memorize the new words to the text.

beaker - мензурка

funnel - воронка

burner - горелка

crucible - тигель

escape - улетучивать

filter-stand - фильтровальная    

                установка

flask - колба

bench - лабораторный стол

glassware - стеклянная посуда

laboratory liquid - лабораторная  

                           жидкость

odour - запах

rack - узкая палочка

scales - весы

sink with running water - водопроводный кран

solid - твердое вещество

test-tube - пробирка

test-tube stand - штатив для   

                         приборок

ventilating hood - вентиляция

vapour - пар

water-bath - водяная баня

practical classes - практические      

                         занятия

experiment - эксперимент

to use - использовать

  to weigh - взвешивать

  weight - вес                                                                             

to mix - смешивать 

mixture - смесь

apparatus - приборы

to dissolve - растворять

to heat - нагревать

to evaporate - выпаривать

to observe - наблюдать

to record - регистрировать

yield - результат

to obtain - получать

pure - чистый  

IX. Translate the following word-combinations:

chemical laboratory, practical classes, the first floor, bottles with liquids, on the shelves, test-tube stands, by a rubber tube, Periodical table, ventilating hood experiment, to use, to weigh, apparatus, weight, to dissolve, solution, to mix, mixture, to heat, to evaporate, to observe, reaction, to record, pure, oxygen, hydrogen, properly, exact, amount.

X. Choose the correct equivalents of the English words.

1.bench          1. колба

2. crucible      2. стеклянная посуда

3. flask           3. лабораторный стол

4. beaker        4. твердое вещество

5. scales          5. весы

6. funnel         6. водяная баня

7. glassware   7. тигель

8. solid           8. горелка

9. burner        9. мензурка

10.water-bath 10.воронка

XI. Translate these words and word-combinations.

штатив для пробирок, горелка, тигель, лабораторный стол, фильтровальная установка, жидкость, бутыль, мензурка, пробирка, колба, во время опыта, в конце реакции, взвешивать вещества, разделы химии.

 

XII. Read the text «Our Chemical Laboratory» and translate it. Do the tasks below.

Our chemical laboratory

This is our chemical laboratory (lab). We have our practical classes on chemistry in the chemical lab. It is a light room. It is on the first floor. Our lab is a large room.

There are two benches in it. There are shelves and racks above the benches. On the shelves, you can see some glasswear. You can see funnels, beaker and flasks of different forms on the shelves. There are also bottles with liquids and solids on the shelves. On the benches, there are burners, crucibles and scales. There are also test-tube stands and filter-stands there.

All the burners are connected with the main gas line by a rubber tube.

There is a sink with running water in every chemical lab.

On the wall, you can see the Periodic Table.

Each student has his or her working place in the lab. There is a ventilating hood for the escaping of disagreeable odour and harmful vapours.

The students of our University study chemistry. They study different branches of chemistry such as organic, inorganic, analytical and other branches of chemistry.

Every week the students attend lectures and have their practical classes on chemistry.

The first-year students study inorganic chemistry. They have practical classes in a chemical lab, which is equipped with special apparatus.

During practical classes, the students make many interesting experiments. They obtain pure oxygen, hydrogen and other elements and study their properties. They often dissolve and mix substances and obtain solutions and mixtures. Before a reaction, they weigh substances, as they have to know the exact amount of substances, which they use in a reaction.

During the reaction they observe it and at the end of a reaction they record the yield.

XIII. Find the sentences with the following word-combinations and translate them:

фильтровальная установка, взвешивать все вещества, разделы химии, изучать свойства, чистый водород, химическая лаборатория, в конце реакции

XIV. Make the sentences using the following word – combinations in the Present Continuous tense:

to have practical classes, to go to the chemical laboratory, to take glasswear from the shelves, to shake the bottles with liquids, to study the Periodic Table.