Most common rocks, after exposed to weathering which cover about ______% 0f the earth:

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1. Rocks which are formed by disintegration of pre-existing rocks by weathering are____________________?

   A. Sand stone B. Classics C. Igneous D. Greis...

2. Soil-forming minerals occurring in rocks do not contain any water, they undergo ______________ when exposed to humid conditions & break down as in chemical weathering process:

   A. Carbonation B. Acidification C. Hydration D. Dissolution Submitted by: Shafiq Rehman...

3. Weathering process-physical, chemical, and biological _______________, the rocks and minerals into simpler products which either accumulate in place or are transported to other places where they become soil parent materials?

   A. Disintegrate B. Disentigrate C. Decompose D. Both a & c Submitted by: Shafiq Rehman...

4. ______________ consist of particles that are produced by disintegration of pre-existing rocks through the process of weathering:

   A. Clastics B. Non-clastics C. both A & B D. None of the above Submitted by: Shafiq Rehman...

5. Soil order characterized by excess of weathering with dominant iron and aluminium oxide clays, common in tropics is_________?

   A. Alfisols B. Mollisols C. Entisols D. Oxisols Submitted by: Shafiq Rehman...

6. Fine-graned rocks formed on earth crust are called____________________?

   A. Intensive igneous rock B. Extrusive rock C. Sedimentary rock D. Plutonic...

7. The relative abundance of three types of rocks ( igneous-metamorphic- sedimentary) in the earth’s crust is_________?

   A. 12.5 % -12.5 % – 75% B. 64.7 % – 27.4 % – 7.9 % C. none of A & B D. 7.9% – 27.7 % – 64.4 Submitted by: Shafiq Rehman...

8. Geochemical weathering processes occurs______________________?

   A. On surface B. Below soil solum C. At the level D. On the mountain...

9. Weathering is_______________________?

   A. Destructive process B. Constructive process C. Both a & b D. None of the above...

10. Biological Weathering involves:

    A. Man and Animals B. Higher Plants and Roots C. Micro- organisms D. All of these Submitted by: Shafiq Rehman...