Conductors and Insulators in Our World

What material is commonly used to make electrical wires because it is a good conductor?

• Plastic

• Copper

• Glass

• Rubber

Which of the following is NOT a good insulator?

• Wood

• Metal

• Styrofoam

• Rubber

Tags

NGSS.MS-PS3-3

What do we call materials that allow heat to pass through them easily?

• Insulators

• Conductors

• Transistors

• Resistors

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NGSS.MS-PS3-3

Why are cooking utensils often made with wooden or plastic handles?

• Because wood and plastic are good conductors of heat

• Because wood and plastic are good insulators of heat

• Because wood and plastic are cheaper than metal

• Because wood and plastic make them look nicer

Tags

NGSS.MS-PS3-3

Which of these materials is used in winter clothing to keep us warm by insulating our body heat?

• Aluminum

• Copper

• Wool

• Iron

Why are electrical plugs typically coated with plastic or rubber?

• To make them flexible

• To make them waterproof

• To prevent electric shocks

• To make them colorful

Which of the following materials would be a poor choice for a pot holder?

• Cotton

• Silicone

• Metal

• Wool

Tags

NGSS.MS-PS3-3

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In a light bulb, which part is the conductor that lights up?

• The glass bulb

• The metal base

• The filament

• The screw cap

Why are birds able to sit on power lines without getting shocked?

• Because birds are not good conductors of electricity

• Because power lines are insulated

• Because birds have special feathers

• Because the power lines are not carrying any electricity

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Why is it dangerous to touch electrical appliances with wet hands?

• Because water is a good conductor of electricity

• Because water is a poor conductor of electricity

• Because water can damage the appliance

• Because the appliance can heat the water