Science review

What is a lodestone?

• A type of metal

• A man-made magnet

• A naturally occurring magnet

• A type of rock

How can a magnet be demagnetized?

• By dropping it

• By painting it

• By cooling it

• By heating it

What is an electromagnet?

• A magnet made from metal

• A magnet made from wood

• A magnet made from electricity

• A magnet made from plastic

What are the properties of a magnet?

• Repels wood and plastic

• Attracts wood and plastic

• Repels iron and steel

• Attracts iron and steel

How to care for magnets?

• Keep them away from heat

• Keep them away from water

• Store them in pairs

• Store them in a jumbled manner

How does the Earth act like a giant magnet?

• The Earth's core is made of plastic, which is magnetic

• The Earth's core is made of iron and nickel, which creates a magnetic field

• The Earth's atmosphere is filled with magnetic particles

• The Earth's surface is covered in lodestones

What is the difference between a permanent magnet and an electromagnet?

• Permanent magnets are always magnetic, while electromagnets require electricity to be magnetic

• Permanent magnets are made of plastic, while electromagnets are made of metal

• Permanent magnets are attracted to wood, while electromagnets are attracted to steel

• Permanent magnets can be turned on and off, while electromagnets are always on

How can you increase the strength of an electromagnet?

• By decreasing the number of coils

• By increasing the current flowing through the coils

• By painting the electromagnet

• By exposing it to water

What is the difference between a magnetic field and a magnetic force?

• A magnetic field is the area around a magnet where its force can be felt, while magnetic force is the actual push or pull exerted by a magnet

• A magnetic field is the push or pull exerted by a magnet, while magnetic force is the area around a magnet where its force can be felt

• A magnetic field is the force of attraction between two magnets, while magnetic force is the area around a magnet where its force can be felt

• A magnetic field is the actual push or pull exerted by a magnet, while magnetic force is the area around a magnet where its force can be felt

How do magnets interact with each other?

• Magnets always repel each other

• Magnets always attract each other

• Magnets can either attract or repel each other depending on their orientation

• Magnets do not interact with each other