81 A Mercury is
Very sensitive to temperature variation
82 Kinetic energy is the energy that is produced by the fact of
Any movement of an object
83 The colour of Emerald is
Green
84 Diamond is the
Hardest known substance
85 Raw cotton, jute and linen are almost pure
Cellulose
86 The Thymus gland is related to
Puberty
87 We get hungry when
Blood gets short of some nutrients
88 A Whale is
A warm blooded creature
89 A clear sky is blue because
Blue light scattered more than red
90 Thrombosis is a disease of the
Blood
