Whale, the largest sea-animal, breathes through its

A. gills

B. lungs

C. fins

D. skin

A clear sky is blue because?

A. red light is scattered more than blue

B. ultra violet light has been absorbed

C. blue light is scattered more than red

D. blue light has been absorbed

Mercury is an unusual substance because it is

A. a metal but in liquid form

B. liquid at room temperature

C. extremely sensitive to temperature variations

D. rarely available

D. Both a, b & c

Can you name the scientist who first of all did some, experiments with gravity? Laws of Gravitation came much later.

A. Newton

B. Cavendish

C. Galileo

D. Marconi

Kinetic energy is the energy that is produced by the fact of

A. nuclear explosion

B. human effort

C. any movement of an object

D. water power