Lesson 3 laboratory equipment Match the following expressions with pictures. What are their Uzbek / Russian equivalents?



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LESSON 3. LABORATORY
Олий ва ўрта махсус таълим тизимини тубдан такомиллаштириш чора, 2 5251699066802277551, 6-Mavzu, 6-labarotoriya ish, word, Jumayev, Baxtiyor shaxsiy 1.0, 16-maktab Standart funksiyalar va algebraik ifodalar 9-sinf

LESSON 3
LABORATORY

Laboratory Equipment
1. Match the following expressions with pictures. What are their Uzbek / Russian equivalents?

1

single neck flat bottom flask

30

analytical balance

3

Erlenmeyer flask

12

Buchner funnel

8

graduated cylinder

11

crucible

5

filtering flask

13

mortar and pestle

2

three neck round bottom flask

18

pH sticks

6

Beaker

7

burette (buret)

4

round bottom boiling flask

29

oven

9

separatory funnel

21

tongs

7

test tube

14

stand

30

pH meter

19

bath

24

buffers

17

ph

20

watch glass

15

ring

26

condenser

5

Buchner fask

22

Petri dish

25

pipette

27

volumetric flask

12

funnel

23

vial

28

filter paper














2. Fill the following schemes with suitable expressions (1-6). What are their Uzbek / Russian equivalents?




A. Filtration


  1. funnel

  2. filter paper

  3. mixture

  4. residue

  5. glass rod

  6. filtrate




B. Distillation

1) Bunsen burner

2) condenser

3) cooling water

4) condensed water

5) thermometer

6) 4mixture

7) stand

8) distillate

9) distillation flask

10) water outlet steam

11) cold water inlet

Countable and uncountable nouns



Ex: 1. Fill in the gaps with the following words in their appropriate forms.


item, glassware, neck, laboratory, approximate, boiling tube, container, mass, weight, experiment, weigh


1) Laboratory ___ glassware ____ refers to a variety of equipment, traditionally made of glass, used for scientific _______ work ____ and other work in science, especially in chemistry and biology ____________________. There are many different kinds of laboratory glassware ____________________.

2) A ________ boiling tube ___________ is essentially a scaled-up test tube, being about 50% larger in every aspect.

3) A bottle is a small ____________________ with a ____________________ that is narrower than the body and a "mouth."

4) Rounded numbers are only ____________________.

5) ____________________is a measurement of how much matter is in an object; ____________________ is a measurement of how hard gravity is pulling on that object. Your ____________________ is the same wherever you are - on Earth, on the moon, floating in space. But your ____________________ depends on how much gravity is acting on you at the moment. You would ____________________ less on the moon than on Earth,



Ex: 2. Which of the nouns are countable and which uncountable in Ex: 1?

countable

uncountable

_____________________________

_____________________________

_____________________________

_____________________________

_____________________________

_____________________________

_____________________________

_____________________________

_____________________________

_____________________________

Ex: 3. Here are some rules about using countable and uncountable words. Write C, if they are true for countable and U for uncountable words.

________ are also called mass nouns

________ can be both singular and plural.

________ have only one form e.g. rice.

________ can be used alone - without articles.

________ must be used with articles - a/ an or the.

________ are used with much and little

________ are used with many and few



Ex: 4. Use these words in the sentences. Make sure you know the difference between the uncountable and countable meanings.


drink / a drink hair / a hair paper / a paper




  1. She has dark __________ just like her mother.

  2. There’s __________ in my soup!

  3. Did you buy __________ today?

  4. All the models in the exhibition were made of __________.

5) __________ was the cause of all their family problems.

6) May I invite you for __________?



Ex: 5. Which of the underlined parts of these sentences are correct?

1) I thought there was somebody in the house because there was light/ a light on inside.

2) Light/ a light comes from the sun.

3) I was in a hurry this morning. I didn’t have time/ a time for breakfast.

4) “Did you have a good vacation?” “Yes, we had wonderful time/ a wonderful time.


  1. Sue was very helpful. She gave me some very useful advice/ advices.

  2. I had to buy a/ some bread because I wanted to make some sandwiches.

  3. It’s very difficult to find a work/ job at the moment.



Alchemy

  1. What is alchemy? What is the difference between alchemy and modern science?

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________



  1. Have you ever read a book or seen a film that dealt with alchemy?

__________________________________________________________________

__________________________________________________________________



  1. Are there any famous alchemists you know?

__________________________________________________________________

__________________________________________________________________




  1. Read the following article. What do the words in bold mean? What is the meaning of the expressions in italics?

Alchemy in the Middle Ages was a mixture of science, philosophy and mysticism. At the heart of medieval alchemy was the idea that all matter was composed of four elements: earth, air, fire and water. With the right combination of elements, any substance on earth might be formed. This included precious metals as well as elixirs to cure disease and prolong life. Alchemists believed that the "transmutation" of one substance into another was possible; thus we have the cliche of medieval alchemists seeking to "turn lead into gold”.

Goals:



  • To find the "philosopher's stone," an elusive substance that was believed to make possible the creation of an elixir of immortality and the transmutation of common substances into gold.

  • In the later Middle Ages, to use alchemy as a tool in the advancement of medicine.

Achievements:

  • Medieval alchemists produced hydrochloric acid, nitric acid, potash and sodium carbonate.

  • They were able to identify the elements arsenic, antimony, and bismuth.

  • Through their experiments, medieval alchemists invented and developed laboratory devices and procedures that are, in modified form, still used today.

  • The practice of alchemy laid the foundation for the development of chemistry as a scientific

There were often many symbols for an element. For a time, the astronomical symbols of the planets were used to denote the elements. However, as alchemists came to be persecuted, particularly in medieval times, secret symbols were invented. This led to a great deal of confusion, so you will find some overlap of symbols. The symbols were in common use through the 17th century; some are still in use today.
5. Were the goals of alchemy achieved?

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________
6. What are the goals of modern chemistry?

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________
7. Look at the following symbols that alchemists used. Can you guess which elements they symbolize? One element can have several symbols.


copper tin mercury gold silver air earth fire iron salt





8. What was the meaning of the word ‘element’ in the Middle Ages? Is it different now?

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________
9. What symbols do we use for elements today?

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________



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