Everyday Science Examination 1975

Time allowed: 2 hours
Maximum marks: 50

Note: (i) Attempt any ten questions.
(ii) Each question carries 5 marks.

1.   What is source of energy  in the sun?
2.   why does water always seem shallower than it is?
3.   what arc polymers? Describe some of the uses?
4.   describe the function of kidneys in the human body?
5.   how is water purified on a large scale’?
6.   describe the various uses of seaweed.
7.   explain the difference between the flying of a jet plane and a rocket.
8.   Name  the parts of the world with which the following birds are associated: (i)Apteryx, (ii) Dodo (iii) Emu, (iv) Ostrich and Penguin.
9.   Give the names of various countries through which the following rivers flow: (i) Danube, (ii) Mekong, (iii) Nile, and (iv) Parana.
10.   What preventive measures should be taken against Cholera?
11.   What first-aid should be given to a drowning person?
12.   Explain the principle of Satellite Telecommunication System.
13.   What in your opinion is the solution of salinity and waterlogging problems?
14.   Describe  the working of a movie projector.
15.   Describe briefly the important by-products of petroleum industry.