Everyday Science Examination 1979

Time allowed: 2 hours
Maximum marks: 50

SECTION I

Define any five of the following terms:

1.   Allotropy
2.   Caloric
3.   Chain Reaction
4.   Horse Power
5.   Osmosis
6.   Television
7.   Heavy Water
8.    Photosynthesis

SECTION II

Answer any four of the following questions. All questions carry Equal Marks.

1.    How do birds navigate over great distances? Describe.
2.    What is “Mimicry in Biology”?
3.    Chromosomes and Genes.
4.    Describe Proteins and their function.
5.    Function of Kidney.
6.   Briefly describe following diseases and their prevention:
   Typhoid
   Plague
   Malaria

SECTION III

Attempt any five of the following questions. All questions carry Equal Marks:
I) describe the difference between an Acid, an Alkali and a Salt.
Name Cement Factories in Pakistan. Describe briefly how Cement is manufactured.
Explain the principle of Satellite Telecommunication System.
 How electricity is measured?
How are electric meters read?
How do Computers compute?
Why do days and nights change in length from season to season.
Define — Earth, Venus, Mercury and Mars.