Q2 of 58 Page 19

What will happen if the atmosphere gets more polluted with smoke and dust?

If the atmosphere gets more polluted with smoke and dust, it will eventually increase the level of harmful gases such as carbon dioxide in the Earth’s atmosphere. This rise in carbon dioxide would further result in a rise in global temperatures, thus, leading to global warming.


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2

You know that the Sun is the source of heat on the Earth. But why do you think the heat varies from morning to night or from season to season and from place to place?

We are listing some variations here. Try to think a reason for it and discuss in the class before you proceed to read this chapter.


1. Cool in the early morning and warmer in the afternoon.


2. Warm in summer and cool in winter.


3. Cool on hill tops and warm in the plains.


4. Warm in equatorial region and cool in Polar Region.

 1

Can you point out the difference between insolation and radiation?

 1

Can you tell why there is a difference in heating of land and water?

 1

Which temperature is higher: 5°C or -5°C?