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Middle School: 6th, 7th and 8th Grade
Science
Electrical Circuits 1
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Q.1
With which group of items could you build a complete circuit?
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Crocodile leads, bulbs, switch, buzzer
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Bulbs, crocodile leads, cell
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Cell, switch, buzzer, crocodile leads
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Wires, bulb, cell
Q.2
Why are electrical wires covered with plastic or rubber?
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Plastic and rubber are comfortable materials to touch
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Smooth materials keep wires from getting tangled
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Plastic and rubber are good electrical insulators
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Plastic and rubber can be made in different colors so people can tell different leads apart
Q.3
Why might a circuit fail to work?
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It might have a dead battery
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It might have two leads connected to the positive pole of the battery and none connected to the negative
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It might have a break in the circuit
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All of the above
Q.4
Which of these materials would be a good electrical conductor?
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Copper
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Glass
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Silver
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Iron
Q.5
What is an electrical circuit?
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A collection of electrical equipment
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A path around which electrical current flows
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A series of conductors and insulators
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A light bulb and battery
Q.6
What will a circuit with an open switch do?
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It will not allow electricity to pass through
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It will allow electricity to pass through
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It will resist electricity
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It will make a good electrical insulator
Q.7
What symbol is used in a circuit diagram to represent a bulb?
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A circle
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Two parallel lines: one short and one long
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An X inside a circle
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The letter M inside a circle
Q.8
A material which allows electrical current to pass through it is called what?
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An insulator
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A cell
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A connection
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A conductor
Q.9
Besides cells, or batteries, what is another source of electrical power?
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Lightbulbs
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Motors
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Petrol
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Electricity mains
Q.10
You have made a simple circuit with one bulb. If you wanted to add an extra bulb without the first bulb dimming, what would you need to design?
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A series circuit
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A parallel circuit
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A complex circuit
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An incomplete circuit
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