First slide

Thermal expansion

Question

Due to Anomalous expansion of water

Easy

A

aquatic animals can exist in cold countries
B

aquatic animals can die
C

water completely freezes
D

all of the above

Solution

density of water is maximum at 4 degree Centigrade, as atmosphere temperature falls, when atmosphere is at 4C ,top layer of water sinks to bottom of lake, as atmosphere temperature falls to 0 degree centigrade and top layer freezes but bottom layer of lake at 4C will remain in liquid state , where aqualife survive

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