Make questions to match the answers. All of them are in the Passive Voice.

For example:

Q – What is being discussed in the lecture room now?

A - The classification of materials is being discussed in the lecture room now.

1.Q – How …

A - Materials can be classified in many ways.

2.Q – What …

A – One of the ways is based on the ability of a material to conduct electricity.

3.Q – What particles …

A – Only charged particles inside the material can be set in motion.

4.Q – How …

A - Such materials are called conductors.

5.Q – Is …

A – The flow of electrons is being controlled.

6.Q – When …

A – The fundamentals of electronics are being discussed now.

7.Q – Who … by

A – The flow of electrons is being described by the student.

8.Q – What … with

A – The conductivity is being amplified with a number of new devices.

15. Match the following sentences with their translations. Which of them are in Passive?

1. Today we shall speak about classifying materials according to their electrical properties.	A. Чем выше температура, тем ниже элект­ропроводность.
2. There are many ways of classifying materials.	B. У них больше свободных электронов, чем у изоляторов, но меньше, чем у проводников.
3. The one we shall speak about is based on the ability of a material to conduct electricity.	C. Они называются изоляторами.
4. Do only electrons take part in conductivity?	D. Cуществуют материалы, у которых мало (или совсем нет) свободных электронов.
5. Сonductivity is the result of the motion of charged particles.	E. Другие заряженные частицы также при­нимают участие в электропроводности.
6. It is directly proportional to the number of charged particles inside the material that can be set in motion.	F. Существует много способов классификации материалов.
7. Only free electrons take part in conductivity.	G. Такие материалы называются проводниками.
8. Metals, for example, having many free electrons, can readily conduct current at room temperature.	H. Сегодня мы поговорим о классификации материалов по их электрическим свойствам.
9. Such materials are called conductors.	I. Металлы, например, имеющие много свободных электронов, могут легко проводить ток при комнатной температуре.
10. Other charged particles also take part in conductivity.	J. Она прямо пропорциональна числу заря­женных частиц внутри материала, которые могут быть приведены в движение.
11. There are materials which have very few (or no) free electrons.	K. Электропроводность — это результат движения заряженных частиц.
12. They are called insulators.	L. Только ли электроны принимают участие в электропроводности?
13. They have more free electrons than insulators, but fewer than conductors.	M. Тот (способ), о котором мы будем говорить, основан на способности материала проводить электричество.
14. The higher the temperature, the lower the con­ductivity.	N. Только свободные электроны принимают участие в электропроводности.

Choose as many words from the table оf ex. 1 as you can and form sensible sentences in Present Simple Passive and present Continuous Passive (affirmative, negative and interrogative).

For example: The number of particles is unlimited.

Match the terms in Table A with their definitions in Table B

Table A

1. classification

2. insulate

3. semiconductor

4. particle

5. conduction

Table B

a. The process by which heat or electricity is directly transmitted through a substance when there is a difference of temperature or of electrical potential between adjoining regions, without movement of the material.

b. A solid substance that has conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects. Devices made of semiconductors, notably silicon, are essential components of most electronic circuits

c. The action or process of classifying something according to shared qualities or characteristics.

d. Any of various fundamental subatomic and most basic constituents of matter, including those that are the smallest, and those that transmit one of the four fundamental interactions in nature (gravitational, electromagnetic, strong, and weak).

e. Prevent the passage of electricity to or from (something) by covering it in nonconducting material.

18. Translate paying attention to the meanings of the word “ one”.

For example: There are many ways of classifying materials. The one we shall speak about is based on the ability of a material to conduct electricity.— Существует много способов классификации материалов. Тот (способ), о котором мы будем говорить, основан на способности материала проводить электричество.

1. There are many types of robots; the ones, we are going to discuss today, are the robots of the 3-rd gen­eration.

2. The new computer is more powerful than the one put into service last year.

3. That semiconductor device is more efficient than the one under consideration.

4. Which of the gadgets is more useful than the new one?

5. There can be many schemes of different devices; the one given in Unit 2 shows the electron flow in a vacuum tube.

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