The relative abundance of three types of rocks ( igneous-metamorphic- sedimentary) in the earth's crust is_________?
Correct answer: B. 64.7 % - 27.4 % - 7.9 %
- 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
Explanation
The commonly cited crustal proportions are approximately 64.7% igneous, 27.4% metamorphic, and 7.9% sedimentary rocks. Thus option B gives the matching sequence.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Soil Science
377 free Soil Science MCQs from Agriculture, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Agriculture questions like this
Agriculture is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Soil Science questions
_________ erosion is the removal of a thin layer of soil by water acting over the whole surface. This type of erosion damaged very fertile lands located on slopes, some of which have been eroded to a depth of about 15 cm.
Soil samples are collected:
Clay and humus particles are referred to as colloids and are less than 0.002mm. Due to their small size, colloids have ________________ surface area which provides surface for adsorption, catalysis, precipitation and microbial colonization:
Oxygen and Silicon together comprise approximately ______ %of the earth crust?
Potassium (K) occurs as a constituent of the earth's crust in the proportion of_________?
Soil Organic Matter (SOM) serves not only as a reservoir of all the required plant nutrients, but it: