Electricity & Lightning

Why do electricians always wrap wires in plastic?

• Plastic comes in many different colors

• Plastic is a good electrical conductor

• Plastic makes the wires easy to bend

• Plastic is a good electrical insulator

Which of these materials is a good conductor of electricity?

• Rubber

• Metal

• Newspaper

• Glass

Tags

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How can it be explained that someone's hair can stick to a balloon?

• There is static electricity

• There is too much dust in the air

• A parallel circuit was too long

• The person needs to wash his hair

Tags

NGSS.MS-PS2-3

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A penny is an example of

• An insulator

• an electron

• a proton

• a conductor

The student arrived home and turned on a light switch, so she could see how to get to her bedroom. The switch allowed electricity to flow and was transformed into-

• Light energy

• mechanical energy

• superior energy

• radiant energy

If an object has more positive than negative charges, its electrical charge is...

• positive
• negative
• neutral or no charge
• opposite

If an object has more negative charges than positive charges, its electrcial charge is...

• positive
• negative
• neutral or no charge
• opposite

If an object has the same number of positive and negative charges, its electrical charge is...

• positive
• negative
• neutral or no charge
• opposite

Atoms may have protons which carry a...

• positive charge
• negative charge
• neutral or no charge
• opposite

Atoms may have electrons which carry a...

• positive charge
• negative charge
• neutral or no charge
• opposite

Tags

NGSS.MS-PS2-3