Q4 of 24 Page 16

What will happen if the temperature of saturated air at 20° C drops down to 10° C abruptly?

With the decrease in temperature from 20 degree C to 10 degree C there will be a relative fall in humidity. With the change in temperature the humidity content of the air changes.


The cold air is capable of holding less water content than that of warmer air even when fully saturated. The temperature fall will make the air lose its moisture content and reduce the humidity index.


Saturation level is that point where no further addition can be made to the present state.


More from this chapter

All 24 →
1

Look at the pictures shown in figure 3.1. Discuss the weather conditions shown in these pictures in the class and write the descriptions in the boxes below

 2

During winters, when you exhale on the glass of your mirror, what happens. If you try to do this in summer why doesn’t this happen?

 3

The vapour holding capacity of 1 cu.m. of air in various temperatures is given here. Calculate the difference in the capacities by observing the table.

 5

Look at figure 3.8 first. Now go out of the classroom in the ground. Observe the clouds in the sky. Discuss the following points in the class and write answers in your notebook.

• What was the colour and size of the clouds?


• What type of clouds did you observe? (Take help from fig 3.8)


• Can these clouds bring rain? Give reasons.