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WAEC Agricultural Science 2006 Question 11

Question 11

Rocks and Soil Formation

Which of the following processes does not lead to the physical disintegration of rocks? The

  1. A.heating and cooling of rock surfaces
  2. B.expansion and contraction of rock minerals
  3. C.formation of cracks and crevices in the rocks
  4. D.rapid cooling and solidification of rocks
Show the answer and explanation

Answer: D (rapid cooling and solidification of rocks)

Explanation

Cooling and solidifying of magma forms rock; it does not break rock down.