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WAEC Agricultural Science 1988 Question 4

Question 4

Rocks and Soil Formation

The alternate heating and cooling of rocks result in

  1. A.sublimation
  2. B.volatilization
  3. C.fragmentation
  4. D.solidification
  5. E.sedimentation.
Show the answer and explanation

Answer: C (fragmentation)

Explanation

Repeated expansion on heating and contraction on cooling cracks rocks into fragments (physical weathering).