Fun Science Experiment For School Students
I have published
curiosity series related to manufacture and use of science equipment for lower
secondary and secondary level home experiments. These type of project can be
also considered to be fun science. Some of our topic related to these are
- Elementary Science Project, Science Project for Kids, Stem Fair
ideas, Fun Science etc, Easy Science project ideas etc.
Here are some fun
science project which you or children can do at home for or may be for School
Project. These project are of very low cost. Now check out the list of project
that I am going to elaborate.
1. C.G.
(Centre of Gravity) WITH MATCH-BOXES
2. THE GAME OF
AIR-PRESSURE-1
3. THE GAME OF
AIR-PRESSURE-2
4. TIN-CAN BOMB
Now lets come to the brief description of all the above mentioned
project.
C.G. (Centre of Gravity) WITH MATCH-BOXES:
A easy and understandable project to demonstrate the Centre of
Gravity.
Necessary Materials to demonstrate C.G. (Centre of Gravity) :
Three match-boxes of a same size, three small but heavy objects (
such as stones), sellotape, three pieces
of white paper ,a cardboard or a book.
Method – How to demonstrate C.G. (Centre of Gravity) :
Firstly, open the boxes and set the heavy object in each of the
small boxes that sticks are kept in, with the help of cellotape. Then enter the
prepared small boxes into the big ones . Stick small pieces of paper. On each
of the boxes and write A,B and C( or 1,2and 3 ) on them respectively . Then
place the boxes in a row on the cardboard ( or book ) .Now raise one side of the
cardboard (or book) slowly and slope it. While doing this, box C will fall at
first and box A at last.
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| Model: Center Of Gravity With Match Box |
Reason why C.G. (Center of Gravity) appears :
As the C.G.( Center of
Gravity ) in box A line in the lower part, that in box B in the middle and
the in box C in the upper part, C falls at first ,B after a short while and A
at last The object in which the C.G.
lies in the lowermost side contains the power to keep itself in balance more
than that in others, and when it is raised upwards, the power decreases too.
That’s why, the above result is seen.
THE GAME OF AIR-PRESSURE-1
Necessary Materials to setup the Game of Air-Pressure:
A small rectangular container made of
tin, a pot, cool water, a source of heat.
Method-how to setup the Game of Air-Pressure?
Open the lid of the container and heat it for some time. Then
remove the container off the source of heat and close it with the lid and then
put it into the pot filled with water. The container will shrivel form all
sides.
Reason- why The container will shrivel form all sides?
In normal condition, the pressure exerted by the air inside the
box and that exerted by the atmosphere outside are equal and contrary, the
shape of the container doesn’t change or it doesn’t shrivel. But, when the
container is heated, air inside it gets heated too and comes out. Thus the
pressure inside the container becomes too low whereas the external pressure
remains same. Thus, because of the external pressure, the container
shrivels.
THE GAME OF AIR- PRESSURE-2
Necessary Materials to setup the Game of Air-Pressure:
A small container made of tin, some water.
Method-how to setup the Game of Air-Pressure?
Make a hole on the cap of the container and make 5-6 more holes
around it with the help of nail. Then make a small hole on the bottom of the
container. Now, dip the container into the pot filled with water and close its
opening with the cap. Then shut the hole with a finger and take out the
container. Water will not fall. Now, remove the finger of the hole, water will
fall through the lower holes and as soon as you
shut the hole, water stop falling.
Reason- why water stop falling?
As the external
(atmospheric) pressure exerted upon the
container is higher then that of water inside the container, the later pushes the
water just inside, water doesn’t fall. But, when the upper hole is open, the
air enters into the container though the hole.
As the total quantity of the
pressure of air and water becomes higher then that of the external atmospheric
pressure, water falls.
TIN-CAN BOMB
(must
be performed with the help of elders)
Necessary Materials for Making of a Tin-Can Bomb:
A container of medium size made of tin, spirit and matches.
Method- How to make a Tin-Can Bomb?
Close the container setting the cap tightly and make a small hole
through the surface slightly above the base (as shown in the picture). Then
keep the container in an open place and put 7-8 drops of spirit into it through
the hole. Now, light the match-stick and bring it near the hole and then set fire
to it. Just after a short while, the container will spring upwards with a loud
sound. It will hear like the explosion of a bomb.
 |
| Model : Tin-Can Bomb |
Reason – How Tin-Can Bomb work?
When spirit is put in the container full of air and a burning
match-stick is brought near it, the spirit inflames rapidly and gas comes out
too. Because of the excessive heat, the gas and the air spread quickly but since there is no exit, they lift the
container and thus the cap comes apart and then air as well as gas come out.
When they come out rapidly, the internal pressure decreases and the container
shrivels due to the external pressure. As the reaction with O2 present in air,
the process of severing of the cap as well as the shriveling of the container
takes place at the same time and a loud sound is produced.
Caution:
Before setting fire ask the
person, if any standing by to move away. The place chosen should be open such
as ground, lawn etc. and run yourself away too quickly after setting fire to
the container.