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WAEC Agricultural Science 2013 Question 9

Question 9

Rocks and Soil Formation

Which of the following statements best describes sedimentary rocks?

  1. A.Pre-existing rocks in which the original mineral has undergone change.
  2. B.Weathered rock transported by wind to other places.
  3. C.Molten magma which has cooled down and solidified.
  4. D.Rocks formed from breaking, deposition and re-cementation of pre-existing rocks.
Show the answer and explanation

Answer: D (Rocks formed from breaking, deposition and re-cementation of pre-existing rocks.)

Explanation

Sedimentary rocks are made of particles of older rocks laid down in layers and cemented.