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Conduction (Experimental)

https://www.udemy.com/igcse-physics-chapter-2-thermal-physics-cambridge-cie/learn/#/lecture/1438420

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Step 2 C : Practical applications of good conductors

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Step 2 C : Practical applications of good conductors

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Step 2 E : Why are non-metals & organic substances bad conductors 

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Step 2 E : Why are non-metals & organic substances bad conductors 

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Low conductivity can be attributed to the lack of / absence of a large number of free electrons

It is because most of the heat energy can be transferred only through free electrons & not by the actual vibrational movement of its atoms

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Substances which do not allow the heat energy to flow through them easily

eg : glass, wood, clay, asbestos, rubber, plastics, wax

Q) All liquids except mercury are poor conductors. Explain

Q) All gases without any exception are poor conductors or Air is an insulator of heat- give reason

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Step 2 B : Why are metals good conductors of heat?

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Step 2 B : Why are metals good conductors of heat?

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1) high conductivity of metals can be attributed to the presence of a large number of free electrons

2) These electrons drift away from the source of heat when the metal is heated, & in doing so carry the heat energy rapidly through the metal

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Step 2 A : Grab some details on  Conductors & Insulators

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Step 2 A : Grab some details on  Conductors & Insulators

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Good conductors : substances through which heat energy can easily flow by conduction

eg. metals : silver, copper. aluminium, gold

non-metals : graphite

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IIT JEE Main & Advanced Physics Video Lecture

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DeltaStep is a social initiative by graduates of IIM-Ahmedabad, IIM-Bangalore, IIT-Kharagpur, ISI-Kolkata, Columbia University (USA), NTU (Singapore) and other leading institutes. At DeltaStep, we understand that just like every child has a unique face, a unique fingerprint; he has a unique learning ability as well.

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Pull up your socks as there's an exciting quiz coming up immediately after this

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Follow the step-by-step instructions

Link for the teacher:

https://play.kahoot.it/#/?quizId=22d4de1b-b687-47f9-bb75-0b9557f96985

link for the students:

https://kahoot.it/#/

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Step 1 A : Check this out -  AVideo on conduction

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Step 1 A : Check this out -  AVideo on conduction

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On the basis of

1) Kinetic model

•1 end of solid rod placed in fire → molecules gain heat energy → molecules vibrate → they strike against the neighboring molecules → they also vibrate violently --> these molecules make the molecules next to them vibrate faster & this process continues till the other end of the rod until the vibrations have been transmitted to all the molecules & the entire body has become hot. • In this way heat energy is transferred by conduction from the hotter part to the colder part

2) Atomic model

•Free electrons are not held strong by the nucleus & move within the metal in any direction but do not leave the metal itself •Metal bar heated --> free electrons gain K.E. --> they drift away from the source of heat --> collide against neighboring atoms& give their energy to them •Electrons with less energy move towards source of heat. Thus they carry energy from hot end of solid to cold end without actual visible movement of atoms

Definition of conduction

The mode of transmission of the heat energy from one atom to another atom of a solid, in the direction of lower temperature, without the actual visible movement of the atoms is called conduction

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Step 3: Install this free App - Heat Transfer

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Step 3: Install this free App - Heat Transfer

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https://play.google.com/store/apps/details?id=wwk.wikikids.com.heattransfer

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Aims & Objectives 
(Bloom’s Taxonomy) :            

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Aims & Objectives 
(Bloom’s Taxonomy) :            

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Remembering

Pupil states the definition of

i) Conduction

ii) Good conductors

iii) Bad conductors

Pupil lists the examples of good conductors of heat, bad conductors of heat  & insulators

Understanding

Pupil explains the process of conduction in his own words on the basis of

i) Kinetic Model

ii) Atomic Model

Applying

Pupil classifies substances as good conductors of heat, bad conductors of heat  & insulators

Pupil investigates the conduction of heat that occurs in multiple aspects of daily life

Analyzing

Pupil distinguishes between Good conductors of heat & Bad conductors of heat

Pupil gives scientific reason for non-metals & organic substances being bad conductors of heat

Skill

Pupil weaves a wool bracelet with the help of straws & wool

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Step 6 : Activity              How to weave a  Cool Wool Bracelet/Wristband

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Step 6 : Activity              How to weave a  Cool Wool Bracelet/Wristband

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All you need is

1) Wool (any color)

2) Adhesive tape

3) 3 straws

4) a pair of scissors

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Bangle Bracelet Weaver Tool Bracelet Tutorial

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Straw Weaving wool Bracelets - Ana | DIY Crafts

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DIY - Straw Weaving wool Bracelets In this video tutorial I show you step by step how to make a wool bracelets Site: http://anadiycrafts.com/ Twiter : https://twitter.com/ana_knoll Facebook: http://facebook.com/anadiycrafts Google+ : https://plus.google.com/+anadiycrafts More videos : https://www.youtube.com/user/anadiycrafts/videos Instagram : http://instagram.com/manualidades_paratodos SUBSCRIBE TO MY CHANNEL : http://www.youtube.com/user/anadiycrafts?sub_confirmation=1 music : https://www.youtube.com/user/PandaDogMusic http://pandadogmusic.com/

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1) Conduction

2) Good and Bad Conductors

3) Practical Applications of Good conductors

4) Practical Applications of Bad conductors