Available Answers

1. 1.

   Tick (√) on the right answer:

   1. It is made of molecules:
   2. It has tightly packed molecules:
   3. It maintains horizontal level:
   4. Insoluble solid can be removed by:
   5. In order to separate a solid dissolved in liquid and to obtain both we use the method of:
   6. The maximum amount of gas in air is:
   7. 21% of gas present in the air is:
   8. Sea breeze blows from:
   9. Seasonal winds or breeze:
   10. It should be placed at a height:
2. 2.

   Give reasons for the following:

   1. A gas does not have fixed volume because ____________________.
   2. Liquids maintain horizontal level because of ____________________.
   3. Ventilators are made at a height ____________________.
3. 3.

   Why does air rise up when heated?

4. 4.

   What are monsoon winds?

5. 5.

   What is air made of?

6. 6.

   Explain 'Sea breeze and land breeze' with the help of labelled diagrams.