1. Spring tides occur on new moon and full moon days because on these days Sun, moon and earth are in a straight line.
2. The instrument, used for recording tremors of earth, is known as Seismograph.
3. The find the hidden secrets under the water, the ships and submarines use the Sonar system.
4. The first Nuclear power plant in Pakistan was established at Karachi.
5. Sodium benzoate is used for preservation of food grains.
6. Steel is more elastic than rubber because ratio of stress to strain is more.
7. O blood group of human beings is a universal donor.
8. First time AIDS was identified in 1983.
9. The heart of a normal adult human being weighs about 300 grams and that of woman 200 grams.
10. Heart pumps 5 litre blood per minute in a normal human adult (at resting position).
11. Histology is the study of tissues.
12. Kitab-al-Manazar is publication by a famous Muslim Scientist about Optics.
13. Nucleus usually lies in the centre of animal cells.
14 . Calcium and phosphorous are the essential elements of bones.
15 . Proteins are formed by combination of amino acids.
16. Rain water dissolves Sulphur dioxide to form Sulphuric Acid.
17. A branch of medicine studying blood and its disorders is called Haematology.
18. Cytology is the branch of biology which deals with the study of structure and function of cells.
19. A study of the chemical composition of the earth‘s crust is called Geology.
20. Frequency of audible sound is 20-20,000 Hz.
21. Deficiency of vitamin B causes Beriberi.
22. The smallest unit of measurement of wave-length is Angstrom.
23. Spinach is a good source of vitamin K.
24. Twenty first of June is the longest day of the year in the northern hemisphere.
25.The outer most layer of the earth is called Crust.
26. Newton is the unit of Force.
27. Radium was discovered by Madam Marie Curie.
28. pH of blood is 7.3-7.4.
29. The speed of light is nearly 300, 0000 km/sec.
30. Our eye is very sensitive to blue light.
31. Light travels fattest in Vacuum.
32. Blue colour has shortest wavelength.
33. In human body, blood clotting factor is produced by the platelets.
34. The young plant inside a grain of wheat is called the Embryo.
35. Muscle stiffness is symptom caused by the disease Tetanus.
36. Thiamine is vitamin B1.
37. Ascorbic acid is vitamin C.
38. Rickets is caused by the deficiency of vitamin D.
39. The most abundant element in the human body is Oxygen.
40. Aviculture is the rearing and breeding of birds.
41 . Malaria is caused by Plasmodium.
42. The science which deals with heredity is known as Genetics.
43. Yuri Gagarin is the first space man.
44. Hydrogen is the lightest gas.
45. Xylem and Phloem are conducting tissues.
46. Water transport in plants occurs within Xylem.
47. Mitochondria are often called the powerhouse of the cell.
48. Polio is caused by virus.
49. Barometer is used for measuring the pressure.
50. Speed of the wind is measured by Anemometer.

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"The greatest glory in living lies not in never falling ,but in rising every time we fall". (Nelson Mandela)