Questions and Answers
Diamond is commonly used as an insulator due to its high conductivity.
False
Glass, rubber, and plastic are examples of conductive materials.
False
Gold and silver are good conductors of electricity.
True
Insulating materials like rubber gloves help protect workers from electricity and heat.
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Density is not considered a physical property of matter.
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Plastics are only used in the food industry and not in other industries.
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Aluminum is a good conductor of electricity.
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Plastic glasses are considered insulating materials.
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The boiling point is not considered a physical property.
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Gold is a poor conductor of electricity.
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Rubber is a good conductor of heat.
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Workers in occupations involving electricity and heat should wear shoes containing conductive materials.
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Study Notes
Physical Properties
- Physical properties are characteristics of a substance that can be observed without changing its nature.
- Examples of physical properties include density, color, hardness, magnetism, boiling point, texture, malleability, and conductivity.
Conductors and Insulators
- Conductors are materials that allow the transmission of electricity and heat, such as aluminum, copper, gold, and silver.
- Insulators are nonmetals that resist the transmission of electricity and heat, such as glass, rubber, and plastic.
- Copper is a good conductor and is often used in electrical circuits.
- Electric current flows through conductive wires.
Hardness and Conductivity
- Diamond has high hardness and is used in cutting rocks.
- The conductivity of wires allows them to conduct electrical current.
Protective Clothing
- Workers in occupations that use electricity and heat must wear protective clothing containing insulating materials.
- Examples of protective clothing include shoes, rubber gloves, and plastic glasses.
- These materials insulate electricity and heat, protecting the human body from harm.
Plastics and Innovations
- The production of new types of plastics can lead to new inventions and innovations.
- New plastics are used in various industries, such as electronics and insulation.
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