5 agents of macanical wethering

Animal actions

• Animals that burrow causes wathering
• This includes moles gophers, prearies doges, and insects

Freezing and Thawing

• Water freezes in a crack of a rock
• When the water turnes in to ice it expands and brakes the rock

Plant Growth

• When roots enter cracks in rocks.
• Roots brake into stuff.
• Make room to grow.

Abrasion

• Sand and other rock particles are carried into the wind, 
• water, or ice can wear away rock
• Chimney rock is an example of Abrasion.

Release of pressure

• Erosion removes material form the surface of a mass rock.
• This pressure causes the outside of the rock to crack and flake