Podcast
Questions and Answers
Why are electric wires coated with polyvinylchloride (PVC) or a rubber-like material?
Why are electric wires coated with polyvinylchloride (PVC) or a rubber-like material?
- To increase the conductivity of the wires
- To make the wires more flexible
- To reduce the weight of the wires
- To provide insulation and prevent electric shock (correct)
What happens when metals strike a hard surface? Do they produce a sound?
What happens when metals strike a hard surface? Do they produce a sound?
- Only some metals produce a sound when they strike a hard surface
- Yes, metals produce a sound when they strike a hard surface (correct)
- Metals produce heat when they strike a hard surface, not sound
- No, metals do not produce a sound when they strike a hard surface
Why are school bells made of metals?
Why are school bells made of metals?
- Because metals produce a sound when struck, making them suitable for bells (correct)
- To reduce the weight of the bells
- To make the bells more durable and long-lasting
- To make the bells more colorful and attractive
Do non-metals also have physical properties similar to that of metals?
Do non-metals also have physical properties similar to that of metals?
Non-metals are either solids or ______ except bromine which is a liquid
Non-metals are either solids or ______ except bromine which is a liquid
The wires that carry current in your homes have a coating of polyvinylchloride (PVC) or a ______-like material
The wires that carry current in your homes have a coating of polyvinylchloride (PVC) or a ______-like material
The metals that produce a sound on striking a hard surface are said to be ______
The metals that produce a sound on striking a hard surface are said to be ______
You must have seen that there are very few non-metals as compared to ______
You must have seen that there are very few non-metals as compared to ______
Flashcards
Insulator in electrical wires
Insulator in electrical wires
A material that prevents the flow of electricity, protecting against electric shock.
Sonorous
Sonorous
The ability of a material to produce a sound when struck.
Metals
Metals
Materials that are generally solid, good conductors of heat and electricity, and have luster and malleability.
Non-metals
Non-metals
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Polyvinylchloride (PVC)
Polyvinylchloride (PVC)
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Rubber-like material
Rubber-like material
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Malleability
Malleability
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Luster
Luster
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