«Утверждаю»
Date:
Зам.директор по УР
Бисалиева
Ж.Е____
«___»________20___г
Lesson №
__
Тhe theme
of the lesson: Batteries
The aims of the lesson:
Активизировать в речи учащихся использование новой лексики, связанную с батареями.
Задачи:
1) читать
текст с пониманием основного содержания
2) восринимать
текст на слух, добиваясь в случае необходимости понимания с помощью переспроса,
уточняющих реплик;
3) повторение лексического материала
The type
of the lesson:
Combined
lesson
Methods
of the lesson:
showing, explaining, individual, group work
The visual aids: lecture, pictures.
Connection
of the subjects:
Physics, Russian.
Procedure of the lesson:
I.
Organization moment:
Good morning? Glad to see you! How are you? What date is it? Who is absent
today? What problem has he (she)? Are you ready for the lesson? Let’s start!
II.Brainstorming. Let’s play a game
“Guess
the word”. The first task is
trying to guess “What are we going to speak about at our lesson?”
Betsaetir -Batteries
III.
Phonetic Drill.
IV. Checking up homework .
V.
Demonstration of the new language:
A)Vocabulary:
Words to the text
In a glass container filled with sulphuric acid there are two
plates: one copper and the other zinc. If the two plates are connected by a
copper wire, electricity will flow through it from the copper plate to the zinc
plate.
This may be shown by the wire becoming hot. If an ammeter is
connected between the plates or electrodes, as they are now called, it will
indicate that an electric current is flowing.
The electrode from which electricity flows is termed the positive
electrode and the receiving electrode is termed the negative electrode.
Thus for the voltaic cell the copper plate is the positive electrode and the
zinc plate the negative electrode. A copper wire will convey electricity and is
called an electrical conductor. Copper, aluminum and silver are outstandingly
good conductors. Conductors must be surrounded by protective material which
does not conduct electricity and prevent it to leak away. Materials which do
not conduct electricity are called electrical insulators; there are
many common examples—glass, wood, rubber, some plastics, “insulation” tape.
Remember that faulty insulation is dangerous and leads to unwanted electrical
flow and probably to local overheating.
One common form of cell is shown in Fig. 9. If two or more cells are
connected together, they form what is called a battery (Fig. 10).
In this diagram the battery is composed of four dry cells connected in
series. By series connection it is meant that the (+-) terminal of one cell is
connected to the ( —) terminal of the next. The purpose in connecting two or
more cells in series is to obtain a higher emf than that available with
one cell alone.
Each cell produces an emf of 1.5 volts, so that if the
voltmeter is connected to the points, it will indicate 1.5 volts between A and
£ , 30 volts between A and C, 4.5 volts between A and D and
6 volts between A and E.
The common flashlight contains several dry cells connected in series.
V.Practice.
a)Выпишите
из текста
интернационализмы.
b)Проанализируйте состав
следующих слов:
flashlight, airplane, dissimilar, nonconducting, outstanding, unwanted,
overheating, zinc-coated, container
c)Переведите словосочетания:
battery cell, dry cell, wet cell, metal plate, glass container, copper wire,
zinc plate, a round carbon rod, liquid electrolyte, a dilute acid solution.
VI. Подберите существительные
к глаголам:
1)to
be composed of a) wires
2) to
produce b) plates
3)to connect c)
electricity
4)to conduct d)
acid solution
5)to contain e)
batteries
6)to consist of f)
an electrolyte, electrodes
7)to surround g)
dry cells
8)to manufacture
VII.
Переведите на английский язык сочетания слов и предложения:
источник электрической энергии; состоит из трех частей; наполненный серной
кислотой; электрод называется положительным, если ...;медная проволока проводит
электричество. Материалы, которые не проводят электричество, называются
изоляционными. Чем больше элемент, тем больше электрический ток. Элементы, соединенные
последовательно.
VIII. Вставьте пропущенные
слова и
выражения:
Copper, aluminum
and silver, electrodes, electrolyte, between the plates
or electrodes, two common forms, electrical energy, copper plate, electrical insulators,
zink
plate, three parts, battery, (+-) terminal of one cell is connected to
the ( —) terminal of the next.
1. A
battery is a source of . . . . electrical energy
2.
Battery cells are manufactured in ... . two common forms
3. The
voltaic cell is composed of ... . three parts
4.
Dissimilar metal plates ... . electrodes
5. A
dilute acid solution ... . electrolyte
6. If
an ammeter is connected ... . between the plates or electrodes
7. The
positive electrode is . . . . copper plate,
8. The
negative electrode is ... . zink plate,
9.
...are good conductors. copper, aluminum and silver
10.
Cells connected together form ... . battery
11.
Series connection means . . . .
(+-)
terminal of one cell is connected to the ( —) terminal of the next.
12. Materials which do
not conduct electricity are called …. electrical insulators
IX. Выполните
следующее задание:
Describe the battery shown in Fig. 10.
X. Battery
Installation
•
Turn
the cordless handset off before battery installation.
1.
Turn
the antenna to the right and pull it out.
2.
Remove
the screw cover on the rear bottom side and release the screw.
3.
Open
the rear handset cover and change the battery.
4.
Assemble
the rear handset cover.
To
charge the battery
Place
the cordless handset on the charger.
Charge
the battery in the cordless handset for about 8 hours before initial use.
•
When
the battery gets exhausted, warning tones will sound. Then, place the cordless
handset on the base unit to recharge the battery.
THE
CARE OF BATTERI
There
are two other precautions, which should be observed in the care of batteries.
First, the top of the battery must be kept clean and the terminals should be
greased lightly. As the acid is extremely corrosive it will damage metal parts
quickly and will cause burns on hands and clothing. Wool is not rapidly
attacked by the acid so battery handlers often wear woolen clothing. The second
precaution is to fill the battery up to the proper point with pure distilled
water only. If tap water is used the battery will fail prematurely. In the
aircraft non- spillable batteries the level in the cells should be up to the
bottom of the filler neck and no higher. In all batteries the water level
should cover the plates and will usually be about a quarter to a half inch over
the plates.
Есть
две других предосторожности, которые должны быть соблюдены на попечении батарей.
Сначала, вершина батареи должна быть сохранена чистой, и терминалы должны быть
смазаны жиром слегка. Поскольку кислота является чрезвычайно коррозийной, это
повредит металлические части быстро и причинит ожоги на руках и одежде. Шерсть
быстро не атакована кислотой, так что тренеры батареи часто носят шерстяную
одежду. Вторая предосторожность должна заполнить батарею до надлежащего пункта
(точки) с чистой дистиллированной водой только. Если вода из-под крана
используется, батарея будет терпеть неудачу преждевременно. В самолете non-spillable
батареи уровень в ячейках должен быть до основания шеи наполнителя и не выше.
Во всех батареях водный уровень должен закрыть (охватить) пластины и обычно
будет о четверти (квартале) к половине дюйма по пластинам.
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