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प्रश्न
Why is the air in a region dry?
उत्तर १
The air in a region is dry primarily due to low moisture content. Moreover, distance from the sea, the high speed of the wind and increased rate of evaporation contribute to a decrease in the moisture holding capacity of the atmosphere.
For example, in Rajasthan, the air is dry and hot leading to the low moisture content in the air.
उत्तर २
We experience the dampness or dryness in the air throughout the year. The changes occurring in the weather conditions in desert areas, coastal areas and mountainous areas.
- Rajasthan lies in a region with dry and hot air. There is hardly any moisture in the air. People wear loose cotton clothes.
- Kashmir valley lies in a region with cold and dry air. Moisture is minimal in the air. People cover themselves with warm clothes.
- In Mumbai, the air is hot and humid. There, the proportion of moisture is very high in the air. In addition, if dark clouds cover the sky, the content of moisture in the air increases.
संबंधित प्रश्न
How does water kept in an earthen pot (matka) become cool during summer?
State three factors which affect the rate of evaporation of a liquid.
Explain why in hot summer days water remains cool in earthen pots.
Would you cool a bucket of water more quickly by placing it on ice or by placing ice in it ? Give reasons for your answer.
Which produces more severe burns : boiling water or steam ? Why ?
How does the water kept in an earthen pot (matka) become cold during summer ?
How will you demonstrate that water vapour is present in air ?
Can you suggest a method to collect water from sea water?
Look at Fig. 1.3 and suggest in which of the vessels A,B, C or D the rate of evaporation will be the highest? Explain.
Evaporation is a fast process and occurs only at the surface of the liquid.
