61 A light year represents no time but

Actually distance

62 A light year is the distance

Light covers in one year

63 One light years is equal to

Six million miles

64 Human race gets more food from ________ than any other single substance.

Starch

65 A triangular glass used for the dispersion of light into its seven constituent colours is called

Prism

66 How much blood a normal healthy person has?

10 Pints

67 A two inch pipe gives ________ times of water than that given by one inch pipe.

Four

68 Inoculation means injecting into the body

The live germs of the same disease

69 The science that concerns itself with the study of the physics of the upper atmosphere is

Aeronomy

70 Soft Iron has

High permeability