Arrange the following zones in ascending order in terms of their latitudinal extent on the Earth surface :

1. Equatorial zone

2. Midlatitude zone

3. Subarctic zone

4. Tropical zone

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Consider the following statements with reference to Feldspar mineral :

1. Half of the earth’s crust is composed of feldspar

2. It has light cream to salmon pink colour

3. Magnesium is a common element in all types of feldspar

Which of the statements given above is/are correct ? 

Consider the following pairs with reference to sedimentary rocks and the process of their formation :  

Sedimentary Rock		Process of Formation
1.	Chere	Chemically formed
2.	Geyserite	Organically formed
3.	Shale	Mechanically formed

Which of the pairs given above is/are correctly matched ? 

Which of the following statements is/are correct ?

1. Oceanic trenches are very significant in the study of plate movements

2. Oceanic trenches are associated with active volcanoes and strong earthquakes

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