We, the students of Bharatiya Vidya Bhavan, had put up exhibitions on various subjects recently. Two days were earmarked for the primary school and another two days for the senior school. The event was attended by guests like deputy commissioner Kendriya Vidyalaya Sangathan, Calcutta region, N.R. Murali and secretary of Sree Ramakrishna Alambazar Math, Swami Saradatmananda (Madhu Maharaj).

There were models and projects put up based on science subjects as well as on economics, history and geography. “This year’s exhibition saw active participation from students of all classes and even though they had very little time to prepare after their class tests it didn’t dampen their spirits,” said Abantika Sen, our English teacher who helped us with the exhibition. 

Haemodialysis

This model showed a hand, with red liquid (meant to be blood) flowing out of it. The blood is shown to be flowing through a coagulant, and waste and excess water in the blood is shown to be collecting in a container. “This method is used to remove waste from the blood of patients suffering from kidney failure,” said demonstrator Ayushi Deb. The model was contributed by Class X, Section A. 

The silver tree

Three glass cylinders were placed showing three stages of a chemical reaction (from right to left in picture). In the first, a copper wire was twisted in the form of a tree. In the second, the tree was doused in a solution and in the third the solution had reacted with the copper wire and white deposits had started appearing. “The copper tree was put in a silver nitrate solution and if the end product is polished it would turn into silver. This is not the easiest way to make silver but was just a demonstration,” showed  Muskan Gupta on behalf of Class IX, Section E. 

 

The LED cube

This physics model was a cardboard box wrapped in black paper that had 125 tiny LED bulbs arranged in the form of a cube. “Through a remote control, we can switch the lights on and off and since the model is wired to the computer, the pattern of the lights can also be changed,” said demonstrator Aditya Yalagoud of Class X Section E. They had made the cube using the programming language C.

Pascal’s Triangle

This mathematics model was probably the simplest one in the room but even the youngest students found it interesting. “The sum of any two horizontally adjacent numbers on this triangle is written just below it,” showed demonstrator Srijani Sarkar. The project had been contributed by Class X Section C.

The chemical volcano

The plaster of Paris volcano had some chemicals sprinkled on top and as soon as demonstrator Srijita Bar heated the top with a match stick, a sparkling yellow flame appeared along with some ash. “The powder was ammonium di-chromate which, when heated, decomposes to produce chromate, nitrogen and water,” said Srijita. The project was contributed by the Science second section (S2) of Class XI.

— Vandita Mittal,
Class IX, Bharatiya Vidya Bhavan
Pictures by Saradindu Chaudhury