Ice wedging is when ice causes rocks to crack by expanding in openings, and ice wedging is the most important form of mechanical weathering. Given these facts, when ice causes rocks to crack by expanding in openings, what is this called among the following options:
- In the winter
 - smoking
 - icing
 - fissures of hot, acidic water
 - mechanical weathering
 - graptolites
 - Inches or fractions of inches.
 - rocking


 

     mechanical weathering    