Advertisements
Advertisements
Question
Give reasons for the following:
Even when the water in the lakes is frozen, fish can survive.
Advertisements
Solution
Even when the water in the lakes is frozen, fishes can survive due to anomalous expansion of water, water has maximum density at 4°C and this dense water remains at the bottom of the lake and the upper layer of water is less dense and freezes but the temperature of each layer of water below increases by 1°C. Thus it is warmer in the lakes below the ice layer. This helps the fishes to survive.C and this dense water remains at the bottom of the lake and the upper layer of water is less dense and freezes but the temperature of each layer of water below increases by 1°C. Thus it is warmer in the lakes below the ice layer. This helps the fishes to survive.
APPEARS IN
RELATED QUESTIONS
Water is used as a cooling agent.
The amount of water vapour in air is determined in terms of its ______.
Draw a graph between volume and temperature, when 5 cm3 of ice at -10°C is heated to form water at +10°C.
Explain why do vegetables and fruits get damaged during severe frost?
The following figure shows a metal cylinder, containing boiling water. One half side A is polished and another half, B is painted black. Two thin metal sheets X and Y are painted black and have one rubber stopper fixed with wax on each sheet. These sheets are equidistant from the boiling water (container A, B) as shown in the diagram. What would you expect to happen after a few minutes? Give a reason for your answer.
In a region with a cold climate the aquatic animals can survive at 4 °C, because _______.
Write the name.
The instrument used to study anomalous behaviour of water.
Observe the following diagram and write the answers to the questions given below.
- Which process does the graph represent?
- What is the range of temperature responsible for the behaviour?
