Question: what are the 6 types of mechanical weathering?
Answer: Frost Wedging or Freeze-Thaw. ••• Water expands by 9 percent when it freezes into ice. ... 
Crystal Formation or Salt Wedging. ••• Crystal formation cracks rock in a similar way. ... 
Unloading and Exfoliation. ••• ... 
Thermal Expansion and Contraction. ••• ... 
Rock Abrasion. ••• ... 
Gravitational Impact. •••