Since, a pencil sharpener contains a blade which is made up of iron. Hence, it gets attracted by both the poles of a magnet.

As, we know that like poles of a magnet repel each other and unlike poles attract each other.
Thus, the complete table is shown as below:

The two properties of a magnet are as follow
(i) A magnet has two poles, i.e. north and south.
(ii) It attracts magnetic materials like iron, nickel or cobalt.

The poles of a bar magnet are located at the two ends of a bar magnet as shown below:

These two poles are North pole (N) and South pole (S).

We can find out a direction by freely suspended a bar magnet. We will find that freely suspended bar magnet always comes to rest in the North-South direction. The end of the magnet that points towards North is called North pole. The other end that points towards South is called South pole.

We can convert an iron strip into a bar magnet by the following method
(i) Take an iron strip
(ii) Place it on the table.
(iii) Now, take a bar magnet and place one of its poles near one edge of the bar of iron.
(iv) Without lifting the bar magnet, move it along the length of iron strip,tiII we reach the other end.
(v) Now, lift the magnet and bring the pole (the same pole we started with) to the same point of the iron strip from which we began.
(vi) Now, move the magnet again along the iron bar in the same direction as we did before.
(vii) Repeat this process about 30-40 times.
(viii) Bring a pin or some iron fillings near the iron strip to check whether it has become a magnet. If not, continue the process for some more time.

(a) Iron bar (i) seems to be the strongest magnet because it has maximum amount of iron filings attracted.
(b) Iron bar (ii) is not a magnet because no iron filings have been attracted by it.

When we break a magnet from its middle, then we get two new magnets. Even if an extremely small magnet is broken into two pieces, then they will have North and south poles, i.e. a small bar magnet is obtained. So, it is not possible for the magnetic poles to be existed separately like charges.

If we face North pole towards the front side of the car and the car is attracted, it means its front side pole is South pole and if it is going away, it means its front side is North pole.

When we place any iron bar near a bar magnet, it becomes a magnet temporary and small objects like pin, iron filings can be attracted by it. But when we remove this bar from magnet, it again becomes an iron bar and does not attract the small iron objects.

It is a suggested way shown in figure below

U-shaped magnet is kept along with an iron piece while bar magnets are kept along with iron strips and magnets separated by wood along their length.

(i) Suresh is cooperative, intelligent and creative boy.
(ii) Some non-magnetic materials are plastic, stainless steel, glass, fibre, etc.

We can do simple experiment for this
(i) Take tea dust on a paper.
(ii) Take a bar magnet in your hand.
(iii) Shake the bar magnet over this dust.
(iv) If some particles are attracted strongly towards this magnet, then definitely tea dust will have iron powder.

(b) A freely suspended magnet orients itself in North-South direction of the earth.
(a) Monami is intelligent and caring girl.

There are following two ways to demagnetise a magnet
(i) by heating
(ii) by hammering