science
Grade-4-
Easy

Question

When water freezes, it breaks down the rock by the force of __________.

  1. Reduction
  2. Expansion
  3. Condensation
  4. Evaporation

hintHint:

When water freezes, it breaks down the rock by the force of expansion.

The correct answer is: Expansion


    • The water will expand when it is frozen and work as a wedge.
    • The frozen water will widen the cracks of the rock.
    • This will lead to splits in the rock. 

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