31.
Pits, formed by the deflating action of wind are called

32.
Which of the following types of coal represents the first stage of formation of coal?

33.
Formation of a rift valley is due to ________

34.
Which metal is most abundant in the earth's crust?

35.
Which European country has over 200 volcanoes, many of them still active?

36.
Which one among the following is the type of the Comoros Islands which lie in the Indian Ocean between Northern Madagascar and the African Coast?

37.
Which is the largest country (in area)?

38.
Which of the country is formed of various number of islands?

39.
How much part of Earth's surface is desert?

40.
The reason behind Earthquake is

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