HOW TO MAKE A MAGNET?

Let's make a small magnet. This magnet won't be so powerful but will be able to attract staple pins.


Materials:
A few sewing needles
1bar magnet (You can use any magnet but for the best results use a bar magnet!)
A few used staple pins

INSTRUCTIONS

Strike a few sewing needles on the bar magnet at least 50 times.

After striking put the sewing needles above the staple pins. What happens?

WHAT IS HAPPENING??

When you strike the sewing needles on the magnet you are MAGNETIZING  the sewing needles. The sewing needles act like a small magnet that attract the staple pins!!!

IN WHICH WATER DOES MOLECULES MOVE FASTER??

Let's see in which water does the molecules move faster-
"cold water or hot water?"

Materials:
Cold water
Hot water
Food colour 
Trasperent glasses

INSTRUCTIONS

 Pour the both samples of water in each glass.

Add two-three drops of food colouring to the samples.

Observation: You will observe that the food colour in cold water spreads slowly compared to the hot water. Hence molecules in cold water move slower than the hot water!