71 The force of attraction between unlike molecules is called

Adhesion

72 The stars in the sky, visible to the bare eye are the

Suns of various systems

73 Distances in the universe are measure in

Light years

74 The earth revolve around the sun in an almost predetermined path which is

Elliptical

75 A constellation is

A group of stars in the heaven

76 If the axis of earth would not have tilted there would have been

No different seasons and days and nights would be of equal length

77 As water is colourless then why Snow is white?

Ice crystals reflect light of all wavelengths

78 Lightning often stops when it begins

Raining

79 Rainbow is formed either in early morning or in

Late afternoon

80 Weightlessness experienced while orbiting the earth in a spaceship is the result of

Acceleration