Question

How does freeze-thaw action work?

A. By rapid evaporation of water.
B. By the expansion of water when it freezes.
C. Through volcanic activity.
D. By chemical reactions.

Answer 1

Freeze-thaw action occurs due to the expansion of water when it freezes, causing rocks and soil to break apart.

Step-by-step explanation:

Freeze-thaw action occurs due to the expansion of water when it freezes. When water freezes, it undergoes a volume increase of about 9%. The expansion of water can exert significant pressure on its surroundings, causing rocks and soil to break apart. This process is especially important in areas with cold climates and frequent freeze-thaw cycles, such as high-altitude regions and polar regions.