Question 4 of 11intermediate💡 UnderstandMCQ1 mark

Which one of the following is the source region for the formation of air masses?

Exercise: EXERCISES | Q: 1(iv) | (Page Page 9)
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Explanation

Option C (the Siberian Plain) is correct because the textbook states that source regions are 'homogenous surfaces' which can be 'vast ocean surface or vast plains.' The Siberian Plain is a vast plain in high latitudes that fits the description of 'very cold snow covered continents in high latitudes' — one of the five major source regions listed in the chapter. The Equatorial forest, Himalayas, and Deccan Plateau do not qualify as homogenous surfaces suitable for air mass formation. Mountains and forests have varied terrain and vegetation, preventing the uniform conditions needed for air masses to acquire distinctive characteristics.

Solution Steps

  1. Step 1: Identify that source regions must be homogenous surfaces like vast oceans or vast plains.

  2. Step 2: Match the Siberian Plain to the source region type: 'very cold snow covered continents in high latitudes.'

  3. Step 3: Eliminate other options as they are not homogenous surfaces suitable for air mass formation.

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