Transcript Conductors and Insulators

20/07/2015
Conductors and Insulators
Learning Objective:
•Make and explain predictions about circuits.
•Support predictions by demonstration circuits, or
circuit diagrams.
•To recognise which materials are better conductors
than others.
Starter: Match up
activity
Component
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Short description
Match up the components to the
Switch
description
Turns the circuit off if too much
current flows
Fuse
Several cells connected together
Ammeter
A very good conductor
Connecting Wires
Changes electrical energy into heat
and light energy.
Bulb
Instrument used to measure the
size of the current.
Battery
Opening and closing them makes
circuits complete or incomplete.
Component
20/07/2015
Short description
Match up the components to the
Switch
description
Turns the circuit off if too much
current flows
Fuse
Several cells connected together
Ammeter
A very good conductor
Connecting Wires
Changes electrical energy into heat
and light energy.
Bulb
Instrument used to measure the
size of the current.
Battery
Opening and closing them makes
circuits complete or incomplete.
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Draw a circuit diagram for the equipment
+
Test material
goes here!
Test as many materials as you can and say whether
they are CONDUCTORS or INSULATORS.
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Conductors and Insulators
Material
Prediction
Observation
Conductor
or insulator
Plastic
Insulator
Bulb off
insulator
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Conclusion.
1. What trends do you notice?
2. Are there any exceptions?
3. In your own words explain why the
bulb lights when some materials are
placed between the crocodile clips and
not others?
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Conductors are usually _______. This is because
metals have lots of tiny particles called
ELECTRONS that can move about and carry
electrical _______.
Other materials are generally _________. This
means that electrical current cannot _____
through them.
The only conductor that is not a metal is carbon,
like in your _______!
Words – pencil, energy, flow, metals, insulators