Advertisements
Advertisements
Question
How does the anomalous expansion of water help aquatic organisms in cold climates?
Solution 1
The anomalous expansion of water helps in the survival of water animals in very cold climates. Initially when the temperature of waterfalls, becomes heavier and sinks down. This process continues till 4°C. Then after this expansion takes place. The surface layer of water gets freezed. Ice being a bad conductor of heat does not allow loss of heat from the water below and results in the survival of water animals.
Solution 2
When water is cooled it contracts and its density, increases until the temperature reaches 4°C, on further cooling water starts expanding with decrease in its density. This is anomalous phenomenon. The aquatic organisms can live there easily.
APPEARS IN
RELATED QUESTIONS
Explain the following:
How can you relate the formation of water droplets on the outer surface of a bottle taken out of refrigerator with formation of dew?
Explain the following:
In cold regions in winter, the rocks crack due to anomalous expansion of water.
Answer the following:
On what basis and how will you determine whether air is saturated with vapour or not?
Calculate the time required to heat 20 kg of water from 10°C to 35°C using an immersion heater rated 1000 W. Assume that 80% of the power input is used to heat the water. Specific heat capacity of water = 42000 J kg−1 K−1.
Draw a graph to show the variation in density of water with temperature in the range from 0°C to 10°C.
Explain, why are soft drink bottles not completely filled?
In a region with a cold climate the aquatic animals can survive at 4 °C, because _______.
Match the columns:
| Column ‘A’ | Column ‘B’ |
| The density of water is maximum at | (a) 0°C |
| (b) 4°C | |
| (c) 100°C |
A graph between the volume and temperature of water is shown. Explain the anomalous behaviour of water.
