Mechanical Weathering

• • Water Gets into cracks into rocks
  • At night water freezes and expands putting pressure on the rock
  • The water thaws releasing pressure then refreezes the next night
  • Repeated freezing and thawing widens the crack which causes the rocks to break up
• What happens at night when water freezes in rocks?

  it expands putting pressure on the rock
• What does repeated freezing and thawing do to the rock?

  widens the crack which causes the rocks to break up