magnetism is an invisible force. it pulls metal objects which are magnetic towards a magnet. there...
TRANSCRIPT
Magnetism is an invisible force. It pulls metal objects which are magnetic towards a magnet. There are lots of different types of
magnets. These include…..
horseshoe magnets,
bar magnets and…
circular magnets.
All magnets have two poles – a South pole and a North pole. You can see them marked on
these pictures.
North pole
South pole
North pole
South pole
North pole
South pole
Poles that are different attract each other. This means the invisible magnetic force will
pull the poles together like this.
Poles that are the same do not attract each other. These will repel. This means they will push each other apart and will not touch or attract each other at all.
Attract and repel are opposites.
Some metals are magnetic. Objects made of these metals are attracted to a magnet. Just because an object is made from metal does
not make it magnetic.
This can is made from aluminium.
Will it be attracted to the
magnet if we put it underneath?
The aluminium can is not
attracted to the magnet.
Aluminium is a metal but it is not magnetic.
This nail is made from iron. Will
this be attracted to the magnet if
we put it underneath?
The nail is attracted to the magnet because
iron is a magnetic metal.
Let’s look at some other objects. Can you guess which ones will be magnetic?
A paper clip
Yes! It’s magnetic
A knife
This knife is made of
steel, which is magnetic.
A pencil
The pencil is not made
from a magnetic material .
A ball
This ball is made of
rubber and is not
magnetic.
A screw
The screw is made from
iron, just like the nail.
Now, let’s see what you can remember about magnetism.
Are all magnets the same shape?
No. There are lots of different types.
Here are some of them.
horseshoe magnets,
bar magnets and…
circular magnets.
Are all metals magnetic ?
No. Only some metals are magnetic
Aluminium is not magnetic.
Iron is magnetic.