2014年11月25日 星期二

Quiz 6: WS8.1 answers

Fill in the Blanks (9 marks)
1      Dry cell stores chemical(1) energy which can be converted into electrical energy
2      A path for electricity to flow through is called a circuit(1).
3      A circuit which is complete is called a closed circuit(1).          
4      A circuit which is incomplete is called an open circuit(1).
5      Materials that allow electricity to pass through are called electrical conductors(1).
6      Materials that do not allow electricity to pass through are called electrical insulators(1).
7      Metals(1) are electrical conductors while most non-metals(1) are electrical insulators.
8      We use a switch(1) to open or close a circuit.

Challenging Questions (Bonus 3 marks)
1.      List TWO necessary conditions for electricity to flow.
A source of electrical energy(1) and a closed circuit(1)
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2.      What non-metal can allow electricity to pass through?
Graphite(1)

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