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13.Correct mistakes in the following sentences.

1. We didn't can work in the laboratory on Sunday.

2. Will be you able to make a report on your scientific research?

3. He could to use the old equipment in his experiment.

4. The teacher can explains this rule again.

5. You will able to cut soft metal with greater speed than hard metal.

6. Engineers will be not able to use this new alloy in industry, I'm afraid.

7. The student not able to determine the nickel content of this copper alloy.

8. Can this technology to make the extraction of copper easier?

14.Translate the sentences into English using your active vocabulary.

1. Як електричний провідник ми можемо використовувати мідь.

2. Він здатний пояснити, як добувають мідь в промислових цілях.

3. Ми змогли вивчити властивості алюмінієвої бронзи на практичних заняттях.

4. Бронза може чинити опір корозії.

5. Перевага міді в тому, що її можна переробляти кілька разів.

6. Мідні сплави можуть бути використані в різних галузях промисловості.

15.Discuss the following questions.

a) What is steel? Can you name the constituents of this alloy?

b) Is steel widely used for engineering purposes? List all possible applications of steel.

16.Andrew has his practice at the steel works. Read his conversation

with Alice and name the types and properties of steels that are men¬

tioned by the students.

Alice: Hi, Andrew, where are you going in such a hurry?

Andrew: Oh, you see, I may not be late today. We are going to the Steel works.

Alice: Really? What will you do there?

Andrew: I don't know yet. Maybe this time we will be allowed to observe how iron is melted, purified and alloyed with other elements and steel is produced.

Alice: Have you been to this works before?

Andrew: Yes, last time we were allowed to work with carbon steels and alloy steels so we could study their properties.

Alice: And what have you found out?

Andrew: Well, many things. Do you know that the hardest, tough¬est, strongest and most valuable steel is tool steel?

Alice: I do now. Maybe you will be able to explain to me why stainless steel doesn't rust? I'm really interested.

Andrew: This is easy. Various alloying elements may be added to the base steel, which greatly improves its properties. Steel may be made corrosion-resistant if chromium is added.

Alice: I see... Well, see you tomorrow.

Andrew: OK. Bye-bye, then.

LESSON 9

Advances in Technology

1. Discuss the following questions.

a) Have you ever seen a hologram? What is it?

b) Where are holograms used nowadays? Make a list of their possible

applications and compare it with that of your partner.

2. Read and learn the new words, write them down into your vocabulary:

Holography-голографія

Hologram-голограма

Respectively-відповідно

Awarded- нагороджено

originally intended- спочатку призначатися

imperfect- недосконалий

lacked- з недоліком

Numerous- числений

Viewable- видимий

Reflection-відображення

Visible-видимий

3. Read the students' conversation and learn how holograms are made.

Nick: Sveta, I'm looking for Boris. Have you seen him today?

Sveta: Yes, he is making a hologram in the lab.

Nick: Is he? And what is a hologram?

Sveta: Look at your watch! See? A hologram is a three-dimensional image. It is produced when laser light is recorded on a holo¬graphic plate.

Nick: I can't imagine Boris experimenting with a laser beam.

Sveta: Well, just ten minutes ago I saw him splitting the laser beam into two separate beams by means of a beam splitter.

Nick: As far as I can see, it's rather difficult to make a hologram.

Sveta: Oh, it is not. If you have all necessary equipment you can

make holograms at home.

Nick: Really? What equipment do I need?

Sveta: Well, the easiest hologram requires a laser, a lens, a holo¬graphic plate, a stable table, a dark room with green safe-lights and a holographic model. Of course, you are supposed to know what to do with this equipment.

Nick: Right. Where can I learn how to make holograms?

Sveta: If you are so interested, you can join our Science Club. By the way, Boris is still in the lab. You can watch him producing a hologram right now.

Nick: Indeed. See you at the Club tomorrow then.

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