Advertisements
Advertisements
Question
Explain the following
Fishes survive in ponds even when the atmospheric temperature is well below 0°C.
Advertisements
Solution
The anomalous expansion of water helps preserve aquatic life during very cold weather. When temperature falls, the top layer of water in a pond contracts becomes denser and sinks to the bottom. A circulation is thus set up until water in the pond reaches its maximum density at 4°C. If the temperature falls further, then the top layer expands and remains on the top till it freezes. Thus, even though the upper layer are frozen, the water near the bottom is at 4°C and the fishes can survive in it easily.
APPEARS IN
RELATED QUESTIONS
Water is used as a cooling agent.
Give reason of Ice floats on water.
How does the anomalous expansion of water help aquatic organisms in cold climates?
The amount of water vapour in air is determined in terms of its ______.
Explain the following:
How can you relate the formation of water droplets on the outer surface of a bottle taken out of the refrigerator with the formation of dew?
What do you understand by the anomalous expansion of water?
Give reasons for the following:
Even when the water in the lakes is frozen, fish can survive.
_______ apparatus is used to study the anomalous behaviour of water.
In cold regions, in winter the pipes for water supply break.
