Question 1

What is magnetism?

Accepted Answer

Magnetism is a force that magnets produce to attract or repel certain materials.

Question 2

Name three metals that magnets attract.

Accepted Answer

Iron, nickel, and cobalt.

Question 3

What are the two poles of a magnet called?

Accepted Answer

North pole and south pole.

Question 4

What happens when two like poles of magnets are brought close together?

Accepted Answer

They repel each other (push away).

Question 5

What is an electromagnet?

Accepted Answer

An electromagnet is a magnet created by running electricity through a wire wrapped around an iron core.

Question 6

How can you make an electromagnet?

Accepted Answer

By wrapping a wire around a piece of iron and passing electric current through the wire.

Question 7

Name two devices that use electromagnets.

Accepted Answer

Electric bells and cranes in junkyards.

Question 8

Why do electromagnets lose their magnetism when the electricity is turned off?

Accepted Answer

Because the magnetic field depends on the electric current; when the current stops, the magnetism disappears.

Question 9

What is a magnetic field?

Accepted Answer

It is the invisible area around a magnet where its magnetic force can be felt.

Question 10

How do magnets help keep fridge doors closed?

Accepted Answer

They attract the metal on the fridge door, holding it tightly shut.

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