Vase is doing experiment , lab activities in his classroom , He is tired due to hungry. How hungry feeling occurs ? How will one know ?

Aravind requires a concave mirror of focal length 10 cm for an experiment of light. He is having lot of concave mirrors in his lab without its focal length values. To determine the focal length of mirror in his laboratory, what are the apparatus required ? How focal length can be determined ?

Your friend is stronger than you and he is very active. Ask him question to enquiry how he managed to do so.

Two identical looking iron bars A and B are given, one of which is definitely known to be magnetised. (We do not know which one). How would one ascertain whether or noth both are magnetised ? If only one is magnetised how does one ascertain which one ? (Use nothing else but the bars A and B).

As a play activity you can also teach how to use a cellular phone, computer, or read a thermometer, etc., to those who do not know how to use them.

A villager Ramayya has a plot of land in the shape of a quadrilateral. The grampanchayat of the village decided to take over some portion of his plot from one of the corners to construct a school. Ramayya agrees to the above proposal with the condition that he should be given equal amount of land in exchange of his land adjoining his plot so as to form a triangular plot. Explain how this proposal will be implemented. (Draw a rough sketch of plot).

How do you know that rusting of iron is a change? If you are given two eggs, can you determine which one is boiled and which one is not ? Explain.

Sunil was unable to see the outside when he came out from the theatre. He don't know how he has come out with other audience. What type of questions he would got in his mind to know the reason?