A material that allows electricity to pass through is called

insulators and conductors

Introduction

Materials that conduct heat or electricity are known as conductors. Materials that do not conduct heat or electricity are known as insulators. Insulators and conductors have many useful functions.

Electrical Conductors

Materials that allow electricity to pass through them easily are called electrical conductors. Examples of these materials include many metals, such as iron, steel, copper, and aluminum.

Electrical objects use metal parts to conduct electricity, such as the copper wires inside electrical leads, the metal pins in plugs, and the metal wire filaments in lightbulbs.

In a simple electrical circuit, copper wire is used to carry electricity from the energy source (such as a battery) to an electrical component (such as a lamp, motor, or bell).

Carbon is an electrical conductor, even though it is not a metal. Water also conducts electricity, which is why electrical objects should not be used near water.

Electrical Insulators

Materials that do not allow electricity to pass through them are called electrical insulators. Examples of these materials include plastic, rubber, wood, and glass. Air is also an insulator.

Most electrical objects are made using insulators to keep them safe. Plugs, for example, have plastic cases. Electrical wires are wrapped in plastic, which is flexible as well as insulating.

The copper wires used in simple electrical circuits are coated in plastic. This prevents electricity from flowing out of the circuit.

Thermal Conductors

Materials that allow heat to pass through them easily are called thermal conductors. Metals, such as aluminum, copper, steel, and iron, are all good thermal conductors. Thermal conductors can be useful when it is necessary to cool things down, or heat them up, quickly. A metal saucepan, for example, allows heat to transfer quickly to the food inside it.

Thermal Insulators

Materials that prevent heat from passing through them are called thermal insulators. A good thermal insulator will keep cold objects cold for a long time, and hot objects hot. Wood, plastic, and many fabrics, such as wool and cotton, are good thermal insulators. Thermal insulators are good materials for keeping people warm. Clothing, carpets, and curtains are examples of everyday thermal insulators.

What is a substance that allows heat or electricity to pass through?

A conductor is a substance that allows heat or electricity to pass through. A few examples of conductors are:

Add your answer:

What material allows heat or electricity to pass through it easily?

Metallic conductors such as copper, aluminum, silver and gold are some examples of materials through which heat and electricity can easily flow.

What Is a material that allows heat to flow through it easily?

A material that allows heat to flow through it easily is called a heat conductor

What is an conductor?

a conductor is a material that allows heat energy or electricity to flow easily

What is a conductor and an insulator?

insulator does not allow heat to pass through. A conductor allows heat to pass through.

What a intervening substance that allows energy to pass?

That really depends on the type of energy. For example, an electrical conductor allows electrical currents to pass, while an optic fiber (or more generally, any transparent substance) allows light to pass. Some substances let heat through better than others, some let sound through better than others, etc.

Mind Maps

Q) Name the device which is used to break the electric circuit or to complete it?
A) Show/hide Answer

Q) Name the device which allows the passage of electricity.
A) Show/hide Answer

Q) Give an example of an insulator?
A) Show/hide Answer

Q) Can electric current pass through a sheet of rubber?
A) Show/hide Answer

Q) The electricity we use at homes, in factories is supplied from?
A) Show/hide Answer

Q) Name a device which converts chemical energy into electrical energy.
A) Show/hide Answer

Q) A device which converts solar energy into electrical energy is called?
A) Show/hide Answer

Q) What is the name of the thin wire inside an electric bulb?
A) Show/hide Answer

Short Answer Questions:
Q) Define Conductors and Insulators?
A) Show/hide Answer

Conductors: Materials which allow electric current to pass through them are called conductors. All metals are good conductors of electricity.
Insulators: Materials which do not allow electric current to pass through them are called insulators. Most of the non-metals are insulators, e.g. asbestos, rubber, wood, etc.

The filament is the part of the light bulb that produces light. Filaments in a burning light bulb are made of tungsten. When electrical current goes through it, the filament glows. To make the bulb produce more light, the filament is usually made of fine wire coils.

Q) State one activity to prove that air is an insulator.
A) Show/hide Answer

Take an electric circuit; keep the terminals disconnected in the air. The bulb will not glow because air is an insulator and it does not allow the current to flow through it.

Q) What is a fused bulb? What happens to the electric cell when a bulb is fused?
A) Show/hide Answer

If the filament of the bulb is broken, the circuit is not completed and hence the current can not flow. The bulb with broken filament is called a fused bulb. When a bulb gets fused, it does not light up.

Q) Explain briefly why the handles of tools like screw drivers and pliers used by electricians are covered with plastic?
A) Show/hide Answer

Plastic and rubber are insulators, which do not allow electricity to pass through them. So, screwdriver and pliers have rubber and plastic covered on them so that electricity may not pass through these tools to the body of the electrician.

Q) What is the purpose of using an electric switch? Name some electrical gadgets that have switches built into them?
A) Show/hide Answer

Electric switches are used to supply or cut electricity to the electric appliance by opening or closing the circuit. Some of the gadgets, which have electric switches built into them, are Torch, Mixer Grinder.

Q) Would the bulb glow in the circuit in which wool is used to connect the battery and bulb?
A) Show/hide Answer

In this circuit, the bulb is connected through a woollen thread with the negative terminal of the electric cell. Since the woollen thread is not a conductor of electricity, it will not allow the electricity to flow through it that is from bulb to electrical cell. Thus the circuit remains incomplete and hence the bulb will not light up.

Q) In which ways the cells are joined in a torch?
A) Show/hide Answer

Cells can be joined in two ways in series and in parallel.
In series: When the (+) terminal of one cell is joined to (-) terminal of the other, the arrangement is called in series.
Parallel: When the (+) terminal of a cell is joined to (+) terminal and (-) terminal to (-) terminal of another cell, the arrangement is called parallel.

Q) Write a short note on Electric cell?
A) Show/hide Answer

Electric cell is a source of electricity. An electric cell produces a small amount of electricity from chemicals stored inside it. When the chemicals in the electric cells are used up, the electric cells stop producing electricity.

Q) Why should an electrician use rubber gloves while repairing an electric switch at your home? Explain.
A) Show/hide Answer

Yes, while carrying out electrical repairs one must wear rubber gloves. This is because, our body is a good conductor of electricity, and if there is any contact of naked wire with our naked hand it will be very dangerous. And if we are with rubber gloves on our hands, the rubber being an insulator will check the contact with the naked wire.

Long Answer Questions:
Q) Why are conductors and insulators equally important? Give reasons?
A) Show/hide Answer

Some materials allow electric current to flow more freely than others. These materials are called conductors. Other materials are resistant to the flow of electric current. These materials are called insulators. Conductors and insulators are both important in the field of electronics.
Conductors and insulators are equally important for us.
Switches, electrical plugs and sockets are made of conductors. On the other hand, rubber and plastics are used for covering electrical wires, plug tops, switches and other parts of electrical appliances, which people might touch.
When you touch a switch you do not get affected by the passage of electric current as the switch is an insulator.

Q) Explain briefly the working of a torch bulb?
A) Show/hide Answer

A torch is made up of a cylindrical or cuboidal casing. The casing can be metallic or non-metallic. The cells are kept inside the casing. The bottom of the casing has a spring which is attached to the metallic wire. The spring helps in keeping the cells securely fit in place. The metallic wire is attached to a switch. The switch is then attached to the negative terminal of the holder. The positive end of the holder touches the positive terminal of the cell at the top. The bulb fits inside the holder.
Working of a torch bulb:
Batteries generate electricity that flows to the bulb of a torch as soon as it is switched on. As a result, the bulb lights up. The bulb of a torch is more or less similar to an electric bulb. The only difference is that it lights up with a low current of a few volts. The batteries supply this current. As soon as the torch is switched on, the chemical present inside the batteries produces an electric current. These batteries are connected to the bulb with the help of a switch. A curved mirror is situated behind the bulb which reflects the light of the bulb in the form of a beam.

Q) Define Circuit. What are Open and Close Circuits?
A) Show/hide Answer

Circuit: The complete path, from one terminal of the electric cell through the bulb and back to the other terminal of the electric cell, is called a circuit.
Open circuit: If there is any gap in the path of a circuit the bulb does not light up. Such a circuit is called an open circuit.
Closed circuit: The bulb lights up only when a bulb and wire form a complete path, which starts at one terminal of the electric cell and ends at the other terminal. Such a circuit is called a closed circuit.

Q) Describe how light is produced in a bulb.
A) Show/hide Answer

Production of light in a bulb is carried out from a thin tiny wire inside the glass cover. This is called filament. It is supported by two thicker wires. One of these thick wires is connected to the metal casing around the base of the bulb. The other is connected to the metal tip of the base. The base of the bulb and the metal tip of the base are the two terminals of the bulb. These two terminals are fixed in such a way that they do not touch each other.
The inside portion of the bulb is filled up by inert gases, like argon.

Q) Explain the A Bulb Connected To An Electric Cell?
A) Show/hide Answer

The bulb is connected to an electric cell through a circuit, which is The complete path, from one terminal of the electric cell through the bulb and back to the other terminal of the electric cell.
If there is any gap in the path of a circuit the bulb does not light up. Such a circuit is called an open circuit.
The bulb lights up only when a bulb and wire form a complete path, which starts at one terminal of the electric cell and ends at the other terminal. Such a circuit is called a closed circuit.
As soon as the path from one terminal of an electric cell to the other is completed, an electric current starts flowing through the circuit and the bulb lights up. The electric current flows from the positive terminal of the electric cell to its negative terminal. In the bulb, current enters through one of its terminals, flows through the filament inside the bulb and comes out through the other terminal of the bulb. When the current flows through the filament, it starts glowing.

Q) What is a Torch Bulb? How it is connected to a cell?
A) Show/hide Answer

A torch bulb is made up of spherical glass which is attached to a metallic base. There is a filament inside the bulb. The filament is attached to two wires. One of the wires is attached to the metallic base of the bulb. Another wire is attached to the side of the metallic portion of the bulb. The side of the bulb is the negative pole, while the bottom is the positive pole.
Connecting the torch bulb to the cell:
For this, you need to attach the wires to the two ends of the cell. The positive pole of the cell should be connected to the positive terminal of the bulb. Similarly, the negative pole of the cell should be connected to the negative terminal of the bulb.

Q) Define Dry Cell. Mention any two advantages of a dry cell.
A) Show/hide Answer

A dry cell is usually made of a metallic cylinder. It has a flat base and a metallic cap on top. The metallic cap on top is the positive (+) end of the cell. The flat base is the negative (-) end of the cell. A cell usually produces 1.5 V of current.
Advantages of a Dry Cell:
a) It converts chemical energy into electrical energy.
b) It is small and light in weight.

Q) Define Light Bulb. Why does it fail to glow?
A) Show/hide Answer

A bulb is the glass part of an electric lamp, which gives out the light when electricity passes through it.
Possible reasons for a light bulb failing to glow:
i) Connections may be loose.
ii) The bulb may be fused.
iii) The cell’s energy may be sapped.

Q) What is an Electrical Switch?
A) Show/hide Answer

This is a device which helps in making or breaking an electric circuit. An electric switch allows us to use electric current as and when required. Switches are seen in many electrical devices and also in household wiring.
(i) When the switch completes the circuit, it is called a closed switch.
(ii) When the switch breaks the circuit, it is called an open switch.

Electricity and Circuits Class 6 Notes Science Chapter 12

June 15, 2022 by Sastry CBSE

CBSE Class 6 Science Notes Chapter 12 Electricity and Circuits Pdf free download is part of Class 6 Science Notes for Quick Revision. Here we have given NCERT Class 6 Science Notes Chapter 12 Electricity and Circuits.

CBSE Class 6 Science Notes Chapter 12 Electricity and Circuits

Power station: Electricity that we use at homes, in our factories, is supplied from a power station.

Electric cell: Electric cell is a source of electricity.

Production of electricity in a cell: An electric cell produces a small amount of electricity from chemicals stored inside it. When the chemicals in the electric cells are used up, the electric cells stop producing electricity.

Terminal: All types of electric cells have two terminals, a positive terminal and a negative terminal. In a dry cell used in our homes, the central carbon rod is the positive (+) terminal and the zinc contained is the negative (-) terminal.

Battery: When two or more cells are joined together, the combination is called a battery.

Bulb: We get light from a thin tiny wire inside the glass cover. This is called filament. It is supported by two thicker wires, as shown in Fig. One of these thick wires is connected to the metal casing around the base of’the bulb. The other is connected to the metal tip of the base. The base of the bulb and the metal tip of the base are the two terminals of the bulb. These two terminals are fixed in such a way that they do not touch each other.
The inside portion of the bulb is filled up with inert gases, like argon.

Circuit: The complete path, from one terminal of the electric cell through the bulb and back to the other terminal of the electric cell, is called a circuit.

Open circuit: If there is any gap in the path of a circuit, the bulb does not light up. Such a circuit is called an open circuit.

Closed circuit: The bulb lights up only when a bulb and wire form a complete path, which starts at one terminal of electric cell and ends at the other terminal. Such a circuit is called a closed circuit.

Flow of current in a circuit: As soon as the path from one terminal of electric cell to the other is completed, an electric current starts flowing through the circuit and the bulb lights up. The electric current flows from the positive terminal of the electric cell to its negative terminal.

In the bulb, current enters through one of its terminals, flows through the filament inside the bulb and comes out through the other terminal of the bulb. When the current flows through the filament, it starts glowing.

Fused bulb: If the filament of the bulb is broken, the circuit is not corhpleted and hence the current cannot flow. The bulb with broken filament is called a fused bulb. When a bulb gets fused, it does not light up.

Electric switch: Electric switch is a simple device that either breaks the circuit or completes it to stop or start the flow of current.

Conduction tester: It is a simple device to test whether a material is a conductor or insulator.

Filament: The thin wire that gives off light is called the filament of the bulb.

Dry cell: Dry cell is a source of electricity. It generates direct current (DC) due to chemical reaction that takes place inside it.

Bulb: An electric bulb is a device which glows and emits light, when electric current is passed through it.

Conductors: Materials that allow electric current to pass through them are called conductors.

Electric cell: Electric cell is a source of electricity.

Electric circuit: The complete path from one terminal of the electric cell through the bulb and back to other terminal of the electric cell is called an electric circuit.

Filament: In electric bulb, there is a thin tiny wire inside the glass cover. This is called filament.

Insulator: Materials that do not allow electric current to pass through them are called insulators.

Switch: Electric switch is a simple device that either breaks the circuit or completes it to stop or start the flow of current.

Terminal: All types of electric cells have two terminals, a positive terminal and a negative terminal.

Life without electricity is difficult to imagine. Many devices and machines in our day-to-day life run on electricity.
Look at the pictures given below. Which of these run on electricity? Write their names in the space provided.

Things that run on electricity have electric current passing through them. In this, chapter, you will learn about electric current, what is needed to produce it, the conditions required to make an electric current flow, and the materials through which current can flow. You will learn some very interesting things like how to make a small bulb glow and how to make an electric switch. Answers: Refrigerator, Fan.

Electric Current
Most of the devices and machines we use like an electric iron, oven, room heater, refrigerator, ceiling fan or an electric bulb work when an electric current flows through them.

With help from an adult, look at what is inside a transparent electric bulb (Fig. 14.1). Among other things, you will see that it has a thin filament (a very thin metal wire). The filament heats up when an electric current is passed through it. It heats up so much that it begins to glow and give out light.
Now, we will learn what produces an electric current.

Source Of Electric Current
A device that can be used to produce an electric current is called a source of electric current. Common sources of electric current are cells and batteries (collection of cells) which comes in various shapes and sizes (Fig. 14.2), and electric current that we get from plug points in houses. A very useful kind of cell which we use very often is the dry cell. Due to a chemical reaction that takes place in cells and batteries, electric current is produced.
For large-scale production of electricity, flowing water or steam is used.

The Dry Cell:
A dry cell is a very convenient source of electric current. The dry cell, as its name suggests, contains dry or semi-solid ingredients.
Let us take a look inside a dry cell [Fig. 14.3(a and b)].

The dry cell contains a paste of ammonium chloride inside a zinc container. Inside the paste, a cardboard container containing powdered manganese dioxide and carbon is placed. The cardboard container has microscopic ‘holes’ in it (such materials are called porous materials) through which a chemical reaction takes place between ammonium chloride paste and powdered manganese dioxide. A rod, usually carbon, with a metal cap is dipped into the manganese dioxide. The whole thing is then sealed (with only the metal cap sticking out), so that the contents do not spill out.

The zinc can is also wrapped so that only the base is exposed. Every source of electric current has two ends or terminals where conducting wires are connected to draw electric current. The tip of the metal cap and the base of the zinc can are called the positive and negative terminals of the dry cell, respectively. Electric current can be thought of as ‘flowing in’ from one terminal and ‘flowing out’ from the other. If the tip of the metal cap and the base of the zinc can are connected by a metal wire, current will flow through it.

Different Types of Electric Cells:
Apart from the simple primary cells like dry cell, there are different types of electric cells. Different cells use different methods for producing an electric current. Primary cells can be used only once, and have to be thrown away once they have been used up.

There are cells that can be recharged once they are drained. These are called secondary cells. They are used in mobile phones, laptops, and car batteries.
Nowadays, solar cells are being used in many applications. Solar cells use sunlight to produce electric current. Fig. 14.4 Some devices that work on dry cell.
Many calculators are powered with solar cells. Solar panels made up of solar cells are used to light up streets and many homes.

Flow Of Electric Current
Three basic conditions (Fig. 14.5) are required for an electric current to flow.

Making a Simple Electric Circuit:
When we connect the terminals of a pencil cell (name given to the cell due to its shape) to a bulb using two wires, the bulb glows. This happens because we provide a path for the current to flow. A path for an electric current to flow is called an electric circuit.

In Figure 14.6(a), one wire from the pencil cell is connected to the torch bulb, while the other wire is not. The electric circuit is not complete here. In Figure 14.6(b), both the wires from the cell are connected to the torch bulb. The electric circuit is complete in this case. Electric current flows only if there is an unbroken path or closed circuit starting from one terminal of the source, through the torch bulb, to the other terminal of the source. Thus, the bulb glows in Figure 14.6(b) but not in Figure 14.6(a). The circuit in Figure 14.6(a) is not complete. Hence, current cannot flow through the circuit and the bulb does not glow. Such a circuit is called an open circuit. The circuit in Figure 14.6(b) is complete. Electric current flows through the circuit and, as a result, the bulb glows. Such a circuit is called a closed circuit.


Electric current flows in a particular direction. In an electric circuit, the electric current flows from the positive terminal to the negative terminal of the electric cell. Figure 14.7 shows the direction of flow of electric current in a circuit.

Electric Switch
We use electric switches (Fig. 14.8) to put on or off the electrical devices and machines. But do you know how it works?

An electric switch is a device that is used to open or close an electric circuit. When we open an electric circuit, the flow of electric current in the circuit stops [Fig. 14.9(a)], and when we close an electric circuit, an electric current flows through it [Fig. 14.9(b)]. In an electrical circuit, a switch is sometimes.

Electric Torch
A schematic diagram of an electric torch is shown in Fig. 14.10. An electric torch has one or more dry cells inside it, which act as the ‘source’. These cells are connected through a switch to a small bulb. When the switch is pushed to the ‘on’ position, the circuit is complete and the bulb glows. When the switch is pushed to the ‘off’ position, the circuit is incomplete (broken). Now the current cannot flow through the circuit, and the light goes out.

Conductors And Insulators
Look at Figures 14.11(a)-(d). Each shows a complete electric circuit. Then why is it that the bulb glows only in circuits (b) and (d)? It is because not all materials allow electric current to pass through them.

A material that allows electric current to pass through it is called a conductor of electricity like the key and the safety pin [Figs. 14.11(b) and (d)]. A material that does not allow electric current to pass through it is called an insulator of electricity like the rubber band and the plastic pen [Figs. 14.11(a) and (c)].

All metals are conductors of electricity while some are better conductors than others. A few non-metals like graphite (pencil lead is made of graphite) are also conductors of electricity.

Examples of insulators are glass, wood, rubber, pure water, and dry air. Flowever, the smallest impurity in water (impurities are substances like salts, dissolved in water) makes it a conductor.
The handles of screwdrivers and testers used by electricians are usually made of wood or hard plastic. They also wear rubber gloves while repairing an electric switch to avoid electric shock.

Electrical Safety
Electricity can be very dangerous, if you do not handle electrical devices carefully. One should never play with electrical wires and sockets. Electricity from cells is safe and you can experiment with it, but you have to be careful not to connect the two terminals of a cell directly through a wire/conductor. Electricity generated by portable generators is dangerous and should not be used for experiments.

Source of electric current: A device that can be used to produce an electric current is called a source of electric current.

Electric circuit: A path for an electric current to flow is called an electric circuit.

Closed circuit: A circuit which has an ‘unbroken path’ through which an electric current can flow is called a closed circuit.

Open circuit: A circuit with a break in it is called an open circuit.

Electric switch: A device that is used to open or close a circuit is called an electric switch.

Conductor (in this chapter): A material that allows electric current to pass through it easily is called conductor.

Insulator (in this chapter): A material that does not allow electric current to pass through it easily is called an insulator.

In a dry cell, a chemical reaction takes place to produce an electric current.

A dry cell contains solid or semisolid ingredients.

All cells have two terminals: the positive and the negative terminal.

Electric current flows only if there is an unbroken or complete path, starting from one terminal of the source, through various devices back to the other terminal of the source.

An electric switch is a device that is used to open or close a circuit.

We hope the given CBSE Class 6 Science Notes Chapter 12 Electricity and Circuits Pdf free download will help you. If you have any query regarding NCERT Class 6 Science Notes Chapter 12 Electricity and Circuits, drop a comment below and we will get back to you at the earliest.

Урок физики, 8 класс на английском языке по теме: «Электрический ток. Проводники и диэлектрики»

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от 3 170 руб. 1900 руб.

Количество часов 300 ч. / 600 ч.

Успеть записаться со скидкой

Форма обучения дистанционная

Раздел долгосрочного плана:

Электрический ток. Проводники и диэлектрики. C ила тока.

Цели обучения, которые достигаются на данном уроке

— Ввести понятие электрического тока;

— объяснять физический смысл электрического тока, его единицы измерения.

— Привести примеры проводников и диэлектриков

Все учащиеся смогут самостоятельно определить какие материалы являются проводниками, а какие – диэлектриками. Большинство учащихся смогут применить формулу расчета силы тока при решении задач

ü применить формулу расчета силы тока при решении задач.

ü смогут объяснить физический смысл силы тока.

ü смогут приводить примеры проводников и диэлектриков

Лексика и терминология специфичная для предмета:

— Source of electricity/ источник тока

Полезные выражения для диалогов и письма:

The potential difference (voltage) of battery “pushes” electrons through wires. The directed motion of charged particles in a circuit is called electric current; Electric current is similar to the water flow in pipes. The formula of electric current is:

Формирование уважения к разнообразию культур и мнений

Привитие ценностей осуществляется посредством/через развитие способности анализировать и давать оценку проблеме с различных точек зрения.

Заряд. Элементарный электрический заряд

Запланированные этапы урока

Запланированная деятельность на уроке

Постановка проблемного вопроса What is the similarity between an electric eel and a bulb?

Цель урока ставят учащиеся вместе с учителем:

На доске висит корзина, учащимся необходимо записать на стикерах все, что им известно по данной теме.

В корзину скидывается все, что имеет отношение к данной теме (идеи, предположения, термины, алгоритм, факты, определения и т.д.)ВАЖНО! Предположения не критикуются и не оцениваются. На данном этапе просто идет сбор информации. Все предположения осмысливаются и анализируются в течении урока. Постепенно из корзины должны исчезнуть все неправильные или некорректные утверждения

Изучение нового материала

прежде чем разделиться на группы учащимся необходимо разгадать загадку:

Есть спина, а не лежит никогда

Есть четыре ноги, а не ходит,

Сам всегда стоит, а другим сидеть велит (Стул)

У учащихся под стульями наклеены изображения треугольников им необходимо разделиться на 4 дифференцированные группы:

1 группа : равносторонние треугольники

2 группа : разносторонние треугольники

3 группа : равнобедренные треугольники

Обратная связь: почему вы разделились имеено так. Учащиеся отвечают, что это все виды треугольников. Спикеров в группах выбирают сами учащиеся

Учащиеся в группах, самостоятельно изучают и составляют проекты по темам

The potential difference (voltage) of battery “pushes” electrons through wires. The directed motion of charged particles in a circuit is called electric current, Electric current is similar to the water flow in pipes. The formula of electric current is:

What charge does pass through 0.5 Ampere Lmp in 200 seconds?

Solution:

Calculation: q= 0.5×200=100 C

1 Ampere of electric current is equal to 1 Coulomb of charge passing in 1 second. That is why 1 Ampere equals to 6.25×10 18 electrons passing in one second

To produce electric current we need batteries. Many electrical devices use batteries: cell phones, watches, toys etc

Conductors and insulators

Some materials allow electric current to pass through them very easily. They are called conductors. However, some materials don\t allow electric current to pass through them. They are called insulators. Finally, there are materials that conduct electricity poorly. They are called poor conductors.

Защита и обсуждение проектов учащимися и учителем.

ФО : сигналы рукой

Оценим проектные работы учащихся:

Мне было все понятно- палец вверх

У меня есть вопросы – палец в сторону

Мне сложно понять тему, я вообще ничего не понял – палец вниз

Обратная связь: ЧТО? ГДЕ?ПОЧЕМУ?

Корректируем «Корзину идей»

Что было лишним?

Физминутка: Учитель называе слова на английском.Если слово относится к теме урока то дети хлопают в ладоши, если не относится к теме, то топают ногами

вывешана на доску, стикеры

Activity – Conductor and insulator. Look at the pictures. Find conductors and insulators on them. Why some objects are conductors and others are insulators? What may happen if you replace them?

We use mAh ( milliAmpere-hour) to describe capacity of the batteries.

Look at the table. Calculate the time needed to charge the devices. Use the formula for electric current.

a) Main materials: battery, wires, crocodile clips.

Extra materials: eraser, paper, spoon, key, etc.

Procedure: Set u p th e construction. Do the same with each material and fill the table.

b) Why do some materials conduct current, and others do not? Can you find the information about that?

Ф.О: Две звезды одно пожелание

Цель Оценить себя, поднять свой уровень

Они рефлексируют свою деятельность на уроке через следующие вопросы:

— что узнал, чему научился

— что осталось непонятным

— над чем необходимо работать

1. A Human body has cells that produce electric current. Why do we need this current? What if we do not have these cells? Can you name these cells?

2. Why do people use electric batteries? What types of electric batteries do you use in everyday life? How do electric batteries work?

3. AAA type battery can store 1 Ah (Ampere x hour) charge. How many Coulombs is it equal to?

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