Металлы и неметаллы

METALS AND NONMETALS  

Преподаватель английского языка

ГБОУ СПО «ММК»

Магомедова Саида Ахмедовна

№ 1.Найдите в правой колонке русские эквиваленты английских слов и словосочетаний:

a. окружающая среда

1. luster

2. property

3. quantity

4. conductivity

5. solid state

6. brittle

7. undergo

8. to protect from

9. environment

10. alloy

11. poor conductor

12. distinction

13. strength

14. hardness

b. защищать от

c. подвергаться

d. плохой проводник

e. количество

f. блеск

g.сплав

h.свойство

i. проводимость

j.твердое состояние

k. хрупкий

l.прочность

m. жесткость

n.различие

№ 2.Переведите на русский язык встречающиеся в тексте интернациональные слова:

metal, metallic, electricity, electric, fact, group, rocket, construction, element, material, corrosion, chemical, electromechanical, product, steel, organic, barrier, industry.

№ 3. Прочитайте текст.

METALS AND NONMETALS

There are some distinctions between metals and nonmetals. Metals are distinguished from nonmetals by their high conductivity for heat and electricity, by metallic lustre and by their resistance to electric current. Their use in industry is explained not only by those properties, but also by the fact that their properties, such as strength and hardness, can be greatly improved by alloying them with other metals. There are several important groups of metals and alloys. The common metals such as iron, copper, zinc, etc are produced in great quantities.

The so-called precious metals include silver, gold, platinum and palladium. The light metals are aluminium, berillium and titanium. They are important in aircraft and rocket construction.

Many elements are classified as semimetals (bismuth. for example) because they have much poorer conductivity than common metals.

Nonmetals (carbon, silicon, sulphur) in the solid state are usually brittle materials without metallic lustre and are usually poor conductors of electricity. Nonmetals show greater variety of chemical properties than common metals do.

Metals can undergo corrosion, changing in this case their chemical and electromechanical properties. In order to protect metals from corrosion the products made of metals and steel are coated by some films (coatings). Organic coatings protect metals and steel from corrosion by forming a corrosion-resistant barrier between metal or steel and the corrosive environment .

№ 4. Ответьте на вопросы по тексту

1 . By what properties are metals distinguished from nonmetals?

2. What common metals are produced in great quantities?

3. What metals are called light?

4. What properties do nonmetals have?

5. What is done to protect metals from corrosion?

№ 5. Разделите следующие элементы на металлы и неметаллы:

Pt

Ag

Sn

Au

Cu

Zn

Al

C

Se

Cr

Ti

Pb

Fe

Si

Bi

Metal Nonmetal

№ 6. Разгадайте кроссворд

7

H

A

R

D

N

E

S

S

7 .

2 .

3.

4 .

1.

6 .

5 .

8.

1 .… is the capacity of a metal to be permanently deformed in tension without breaking.

2

M

A

L

L

E

A

B

I

L

I

T

Y

6

2 .…… is the capacity of a metal to be permanently deformed by compression without rupture.

I

R

O

N

A L U M I N I U M

4

3 .….of a metal is the property of resistance to external loads and stresses.

S T R E N G T H

3

4 .What metals are called light?

D U C T I L I T Y

1

5 .…. is a ferrous material having some carbon content.

8

6 .What is the most important metal?

A

L

L

O

Y

S T E E L

5

7 .What mechanical properties of metals do you know?

8 . Translate that word «сплав».

Источники :

• http://www.youtube.com/watch?v=2WDED5qaflE
• http://technical-text.narod.ru/METALS.html
• http :// mirgif . com