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| ELECTRIC CURRENTS AND THEIR PROPERTIES 1. Conductions is the name normally given to a movement or flow of charges. 2. The charges are usually electrons, but may also be ions when the conduction takes place ingaseous or liquid conductors, in which the ions are mobile. 3. How does the current flow through a wire? 4A metal is made up of tiny crystals which are visible under a microscope 5.. A crystal is a regular and ordery arrangement of atoms. 6. An atom is a complex particle in which tiny electrons move around nucleus. 7. When the atoms are tightly packed as they are in a metallic solid, some of the electrons move freely between theatoms. 8. These are called free electrons. 9 Ordinarily, the free electrons move at random through the metal. 10. There must be some driving force to cause the electrons to move through the metal conductor 11. This driving force tending to produce the motion of electrons through a circuit is called an electromotive force or e. m. f. 12 It moves electric charges from one point in the circuit to another. 13. When an electromotive force is applied to the ends of a wirethe free electrons move in one direction.14. It is the movement of the free electrons in a conductor that induces an. electric current. 15. The greater the number of participating electrons, the greater is the flow of current. 16. No one has ever seen an electric current. 17. We only know of the existence of a current by its effects. 18 A current can heat a conductor, it can have a chemical action when passing through a solution, or it can produce a magnetic effect. 19. We can measure currents byobserving their heating, their chemical, or their magnetic effects. | 1. - . 2. , , , , . 3. ? 4 , ..5 - . 6. - , . 7. , , . 8. . 9 , 10 , 11. , , e. .. f. 12 . 13. , 14. - , .. 15. , - . 16. ͳ c. 17. . 18 , , , . 19. c, , |
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Shut the right side and translate from native language into English
8.3.7 Finish sentences: 1. The charges are usually 2. Conductions is the name normally
3. A metal is made up of tiny 4. An atom is a complex particle 5. Ordinarily, the free electrons move 6. There must be some
Answer the questions
Match the sides
X. Summarizing
XI. Homework- read and translate. Learn the words and terms
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I. :.
Who is on duty today?
Who is absent?
What date is today?
What day of week is today?
II. :
Todays topic is ONDUCTORS AND INSULATORS. :
to recognize new words and expressions,
to understand their meaning and operate by them discussing the text;
to identify main ideas and details from the text;
to participate in common conversational exchanges on the topic of today's lesson.
III. :
The knowledge of this topic will increase your outlook and knowledge of some interesting facts about metals, their place in the life, as future specialists you must be well-educated, cultured people. This information will help you in your future profession
IV. .
Grammar tests:
V) :
Watch the short video. Try to understand and answer the questions
VI) O :
I'll check your homework.
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VII.
VIII.
1 Introduction with a new words
2 Exercises
3. Introduction with a new topic
4 Exercises
5. Reading the text
IX Homework
X.Summarizing
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Read and remember
| 1 Conductors 2 low 3 resistance 4 current 5 pass through 6 the most common 7 the advantage 8 much cheaper 9 is widely used 10 to produce 11 a voltage source 12 change 13 the value 14 increase 15decrease 16insulator 17 difficulty. 18 voltage |
