• Be able to describe the process of conduction in
terms of the transport of vibrational energy by free electrons.
• Complete an extended writing task to explain why
some materials are more effective conductors than others.
Task 1 - Recap
Remind the person next to you:
- What type of materials does conduction occur in?
- What type of materials are particularly good
conductors?
- What do we call a material which is a poor conductor?
- What kind of energy do the particles gain as heat
travels along the material?
Task 2
Copy and complete the sentences below:
Conduction occurs in all ___________.
Most ___________ are good conductors, and most
____-__________ are generally poor conductors.
We call a poor conductor an _______________. Plastic
and wood are both very _______ conductors so they are good
_______________.
____________ and gases are known as __________.
Fluids are very poor ____________.
Task 3
You will remember that last lesson we carried out an
experiment to compare how effectively different materials conduct.
We looked at the idea of heat being transferred along the
material, something like this...
In fact it is more like this.
We want to be able to explain the process of conduction
in more detail. Look at these
diagrams and listen as your teacher explains how conduction depends
on free electrons.
Teacher note - copy of diagrams for pupils in word format
here.
Task 4
We want to explain why copper is a better conductor than
glass.
Write a draft of your explanation in
the back of your exercise book. Try to use as many of the words as
you can in your explanation.
When you have finished your draft your teacher will ask
some of you to share your ideas. Listen carefully as each person
expresses their ideas and see if you can add anything to your
explanation.
Homework
Complete your explanation, including any improvements you
have managed to make. Include at least one diagram.
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