5 mechanical weathering

1 animal action

• animal action happens when animals weaken the ground by digging. animals 
• that dig include moles mice earth worms ect.

2 freezing and thawing

• When water freezes in a crack in a rock it expands and makes the crack
• bigger.  The proses of frost wedging also widens cracks in cement.

3  plant growth

• happens when plants break through rocks. they can create homes for small an

4 release of pressure

• when stone increases in size and breaks the out er layer. happens to rocks.

5 abrasion

• when wind blows on rock and thins it out. this happened at the garden of 
• the gods.