lesson
Does the material complete the path?
1 · Learn
An electrical conductor allows charge to move through it readily. Many metals are good conductors. An insulator, such as suitable plastic or rubber, resists this movement strongly in ordinary classroom conditions.
To compare samples, insert one adult-approved sample into a gap in the same low-voltage test circuit. A lamp staying off can also mean a poor connection, so check the setup before drawing a conclusion.
2 · Worked example
The lamp lights with a suitable metal sample and good contacts. With a plastic sample it stays off. I retest the known conducting connection to check the equipment still works.
3 · Your turn
Does a lamp staying off prove the tested material is an insulator in every situation?
Check your answer
No. The circuit may have another fault or poor contact. Test carefully and keep conclusions limited to the evidence and conditions.
4 · Apply your learning
Compare adult-selected safe samples in a supervised low-voltage circuit and record material, prediction and result.
Adult guidance and safety
Never test people, liquids, sockets or mains cables. Use dry safe samples, matching components and no short circuits; the adult controls the kit.
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My observation notebook
With an adult, look at a safe real example or a checked photograph. Name the example and say which you used. Record what you actually notice. Do not taste plants or materials, approach unknown animals or invent missing observations.
Ask your teacher for support with the method and recording. A prediction is what you think might happen; an observation is what you actually see, hear or feel safely.
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Your records on this page
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