Generation Genius Magnetism Article

What is a magnet?

• An object that can attract some metals like iron

• An object that can repel all metals

• An object that can only attract non-metals

• An object that can only repel non-metals

What happens when two north poles of magnets are brought close to each other?

• They repel each other

• They attract each other

• They neither attract nor repel

• They become stronger

How can the strength of an electromagnet be changed?

• By changing the amount of electricity connected to it

• By changing the type of metal used

• By changing the shape of the magnet

• By changing the temperature of the environment

What is static electricity?

• The buildup of electrical charge in an object when it is rubbed against another object

• The flow of electricity through a conductor

• The magnetic field around a magnet

• The force that holds atoms together

What causes a balloon to stick to your hair after rubbing it on your head?

• Opposite electrical charges develop between the balloon and your hair

• The balloon becomes magnetized

• The balloon becomes heavier

• The air pressure changes around the balloon

What is the simplest way to see a magnetic field?

• Sprinkle iron filings around a magnet

• Use a compass

• Use a voltmeter

• Use a thermometer

What happens when you shuffle your feet across the carpet and then touch a doorknob?

• Static electricity causes a charge to transfer to the doorknob

• The doorknob becomes magnetized

• The carpet becomes electrically charged

• The doorknob repels your hand