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Grades 6, 7 and 8 - Science - Middle School - Electrical Circuits
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Electrical circuits are closed paths for currents to flow and they are usually made of components joined by wires. Electricity travels at the speed of light, more than 186,000 miles per second. Insulators and conductors are words used in relation to electrical circuits. Voltage and wattage are also important terms related to electrical circuits.  A bolt of lightning can measure up to three million volts and lasts less than one second! The irrational fear of lightning (and thunder) is known as astraphobia. There are some 16 million lightning storms in the world every year.

Grades 6, 7 and 8 - Science - Middle School - Electrical Circuits
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25 Questions

1. Which of the following does a light bulb do?
2. Wires are normally made from copper. This is because .......
3. What is an electrical circuit?
4. What does an electric circuit need to provide energy?
5. In order to measure the current flowing through a bulb in a circuit, the ammeter is connected in .......
6. Two bulbs are in series in a complete circuit. If the voltage increases .......
7. What is used to measure the flow of current in a circuit?
8. What symbol is used in a circuit diagram to represent a bulb?
9. Three identical bulbs are in parallel in a complete circuit. The current in each bulb .......
10. A complete circuit has .......
11. Three bulbs connected in series .......
12. Wires are usually coated in plastic because .......
13. 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?
14. What is the unit of electric current?
15. A material which allows electrical current to pass through it is called what?
16. If more bulbs are added in series in a series circuit .......
17. Why are electrical wires covered with plastic or rubber?
18. Why might a circuit fail to work?
19. Which of the following statements is true?
20. Which of these materials would not be a good electrical conductor?
21. With which group of items could you not build a complete circuit?
22. Which of the following statements is true?
23. In order to measure the voltage across a bulb in a circuit, the voltmeter is connected in .......
24. Two identical bulbs are in parallel in a complete circuit. A third identical bulb is connected in parallel. What happens?
25. If the size of a battery in a complete circuit increases .......

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