Interactions c1 magnets & their characteristics

My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited

Questions to think about…

How do two

magnets interact?

What characteristics

do magnets have?


Magnets

• Magnets are ‘special’ stones that interact with

some metals. They are known as natural

magnets.

• There are also man-made magnets which are

made of iron or steel.


natural magnets

What characteristics do magnets

have?

• A magnet attracts an object when the

object is pulled towards the magnet.

What types of objects are

attracted to a magnet? Which

types are not attracted to a

magnet?



have?

• Which materials are attracted to a

magnet?

o Objects made of metals like iron and steel

are attracted to a magnet.

o These are known as magnetic

materials.

iron nails



have?

• Which materials are attracted to a magnet?

o Not all metals are magnetic. They are called non-

magnetic metals.

o Metals like gold, aluminium, silver and copper

cannot be attracted to a magnet.


Coins made of

non-magnetic

metals cannot

be attracted to a

magnet.


have?

• Which materials are attracted to a

magnet?

o All non-metals such as plastic, wood, paper,

glass and clay cannot be attracted to a

magnet.

o These materials are called non-magnetic

materials.



have?

• Which part of a magnet is the

strongest?

o The attraction of a magnet is

strongest at its ends.

o The ends of a magnet are called

its poles.

The paperclips

are mostly

attracted to the

poles of the

magnet. My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited


have?

• Finding the North-South direction

o What happens if you allow a magnet to turn

freely?

• When a magnet is allowed to turn freely, it will

come to rest in the North-South direction.


This magnet comes to

rest in the North-South

direction when allowed to

turn freely on a floating

piece of styrofoam.


have?

• Finding the North-South

direction


This magnet is

suspended by a thread

and allowed to turn freely.

It will eventually come to

rest in the North-South

direction.


have?

• Finding the North-South direction

o The pole pointing to the North is called the

north-pole.

o The pole pointing to the South is called the

south-pole.

My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited

north-pole south-pole

How do two magnets interact?

• What happens when the north-poles of

two bar magnets face each other?

o The north poles of the magnets push each

other apart.


N

S N

S

The same thing happens

when the south-poles

face each other.

When two like poles are

brought together, they

push each other away.

This shows that like

poles repel.

How do two magnets interact?

• What happens when the north-pole of a

magnet is brought near the south-pole of

another magnet?

o The poles of the magnets are pulled together.

o This shows that unlike poles attract.

My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited N

S

N

S



Date post:	14-Apr-2017
Category:	Science
Upload:	jody67894
View:	357 times
Download:	0 times