Available Answers

1. 1.

   Fill in the blanks.

   1. The air in the lower layers of the atmosphere is _______________ than in the upper layers.
   2. The temperature of the troposphere drops by about ____________ for every 1 km.
   3. _______________ protects us from the deadly ultraviolet radiations.
   4. The heat that the earth's surface radiates back in the atmosphere is called _________________.
   5. _____________ enhances the process of Ozone depletion.
2. 2.

   What is the atmosphere? Give its composition.

3. 3.

   What is the significance of stratosphere?

4. 4.

   How does the atmosphere protect us from scorching solar heat and dazzling light?

5. 5.

   State three causes that lead to increase in Greenhouse Gases?

6. 6.

   What is meant by Global Warming? Give any three consequences of Global Warming.