IV. Language.

Exercise 10. Find the correspondence.

1. dangerous 2. phenomenon 3. to invent 4. to solve 5. conductor 6. achievement 7. powerful 8. according to 9. necessary 10. property 11. to learn

1. могутній 2. властивість 3. дізнаватися 4. винаходити 5. вирішувати 6. явище 7. небезпечний 8. досягнення 9. провідник 10. згідно з 11. необхідний

V. Comprehension.

Exercise 11. Find the wrong statements and correct them.

1. Lightning results from a discharge of atmospheric electricity between charged clouds.

2. There is always some danger in a thunderstorm for a man standing in the open field.

3. Michael Faraday invented the lightning conductor to protect houses from thunderstorms.

4. Early Scandinavians thought that thunderstorms were produced by Thor, the god of thunder.

5. It is very pleasant to be out during a thunderstorm when dark clouds cover the sky turning day into night and watching lightning flashes followed by thunder.

6. Some years ago people learned to protect their houses from thunderstorms.

7. The lightning conductor is a metal device protecting buildings from strokes of lightning by conducting the electrical charges to the earth.

Exercise 12. Answer the following questions.

1. What is the earliest manifestation of electricity?

2. Are lightning and atmospheric electricity one and the same thing?

3. What did the early Scandinavians think about thunderstorms?

4. What is lightning?

5. Do you like to be out during a thunderstorm?

6. Is it dangerous to be in the open field during a thunderstorm?

7. Do people protect their houses from thunderstorms?

8. What does lightning usually strike?

9. Who invented the lightning conductor?

10. Who constructed the first electrical measuring device in the world?

VI. Oral Practice.

Exercise 13. Speak on the story told by the early Scandinavians.

VII. Reading.

Exercise 14. Read the text B in 3 minutes and give a heading to each paragraph.

Text B.

Is Lightning Good or Bad?

The intensity of Lightning is tremendous. When we hear noises on our radio, we conclude that a storm is occurring somewhere in the country. It is not really the case. Similar disturbances have been heard on radio in New York, San Francisco, and elsewhere. It has been proved, moreover, that a powerful flash of lightning in the jungle of India or over the South States suffices to produce disturbances on every radio throughout the world.

Lightning performs some very useful services for mankind. Every stroke of lightning produces some quantity of nitric acid from the nitrogen, hydrogen, and oxygen of the air. About 100,000 tons of nitric acid are produced in this way each year. It is more than man can produce nitrogen by the artificial process.

VIII. Comprehension.

Exercise 15. Point out which of the sentences contains the information from text B.

1. Coming down from a charged cloud to the earth, lightning usually strikes the nearest conductor.

2. Strokes of lightning can destroy buildings that’s why lightning conductors are used to protect them.

3. Strokes of lightning can produce disturbances on radio and at the same time they can do some useful things.