Electricity

What is static electricity?

• A temporary electrical charge created by rubbing two objects together

• A type of electricity that powers our homes

• The flow of electric current through a conductor

• The discharge of electricity in a thunderstorm

Explain the law of conservation of charge.

• The total charge in the universe is increasing.

• Electric charges move from one place to another, but the total charge remains the same.

• Electric charges can be created or destroyed.

• Electric charges can only move through conductors.

Compare conductors and insulators.

• Conductors allow electrons to move freely, while insulators do not.

• Wood is a good conductor of electricity.

• Insulators can conduct electricity better than conductors.

• Conductors and insulators are the same.

What causes lightning?

• The movement of clouds in the sky

• A large electric field causing the air to be ionized and creating a conductive path

• The sun heating the earth

• Static electricity from rubbing two clouds together

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Why do we hear thunder after we see lightning?

• Because thunder travels faster than lightning

• Because lightning is silent

• Because the speed of light is much faster than the speed of sound

• Because thunder is caused by something else

What are metals considered good conductors?

• Because electrons can easily break away from metal atoms

• Because they are heavy

• Because they can hold more electrons

• Because they are shiny

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What is charging by induction?

• Creating a charge by moving an object through a magnetic field

• The rearrangement of electrons on a neutral object caused by a nearby charged object

• Transferring charge by touching two objects together

• Destroying electric charges

Why are plastics considered insulators?

• Because they are used in making electronic devices

• Because atoms in these materials hold onto their electrons

• Because they are flexible

• Because they can conduct electricity

What happens when a step leader meets a positive streamer?

• It creates a rainbow

• It results in a power outage

• Nothing significant happens

• A massive strike of electric current flashes, creating lightning

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What is the temperature of a lightning strike?

• 5,000 degrees Celsius

• 1,000 degrees Celsius

• Over 20,000 degrees Celsius

• 100 degrees Celsius