11.
Choose the correct option with the correct sequence of the layers of atmosphere

12.
Which of the following is especially true of anticyclones in the southern hemisphere?

13.
Countries favourably influenced by Westerlies are ________

14.
Which of the following is/are characteristic of a depression in the southern hemisphere?
I. It is a mass of air whose isobars form an oval or circular shape
II. Pressure is high in the centre and decreases towards the outside
III. Air moves anti-clockwise

15.
The hot and dry winds that help in the ripening of grapes in the Alps region is ________

16.
What is approximately the quantum of the pressure exerted by the atmosphere at sea level?

17.
What is the percentage of Nitrogen in atmosphere of the Earth?

18.
At low elevation which among the following clouds are to be found ?

19.
The jet aircrafts fly very easily and smoothly in the lower stratosphere. What could be the appropriate explanation?
1. There are no clouds or water vapour in the lower stratosphere.
2. There are no vertical winds in the lower stratosphere.
Which of the statements given above is/are correct in this context?

20.
The most important factor in thunderstorms development is ________

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