Electricity: Lesson review

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

• positive
• negative
• neutral or no charge
• opposite

True or False
A positively charged object has lost electrons

• True
• False

Tags

NGSS.HS-PS2-5

Materials that tightly hold on to their electrons are considered 

• Good conductors
• Good insulators
• Good anti-static agents
• Useful for storing charge

Tags

NGSS.HS-PS1-1

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Materials that easily lose or accept electrons are considered

• Good conductors

• Good insulators

• Good anti-static agents

• Good for storing charge

What is the major difference between static electricity and current electricity?

• Current electricity involves a continuous flow of neutrons; static electricity is a sudden transfer of protons
• Current electricity can be deadly; static electricity is almost always safe
• In current electricity, there's a single transfer of electrons; in static electricity, there's a steady flow of electrons
• Current electricity involves a flow of electrons; static electricity involves a single transfer of electrons

Charge separation in clouds is one way

• that freezing rain occurs
• that lightning occurs
• that low pressure system occurs
• that a tornado occurs

Tags

NGSS.MS-ESS2-5

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Bending water with a charged balloon is an example of what type of charging (charging an object without touching)

• friction

• induction

• conduction

Tags

NGSS.MS-PS2-5

What happens when you touch a metal doorknob after rubbing your shoes on the carpet?

• The doorknob sends a burst of electric current into your body

• Millions of electrons go from your finger into the doorknob

• The doorknob sends millions of electrons into your finger

• Your finger becomes negatively charged

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

If you bring a charged object near an electrically neutral surface without allowing the object to touch the surface, the charges in the surface are rearranged by

• friction.
• convection.
• induction.
• conduction.

Tags

NGSS.MS-PS2-5

A region around a charged particle that can exert a force on another charged particle is called an

• electric pulse.
• electric charge.
• electric force.
• electric field.

Tags

NGSS.MS-PS2-5