Mechanical Weathering
This is caused by physical changes such as
changes in temperature - freezing and
thawing. There are no chemical changes.
Frost Shattering (Freeze-tha
Water expands when it freezes into ice. The form
can also break rocks.
Temperature changes
When a rock gets hot it expands a
little, and when a rock gets cold
it contracts a little. If water gets into a crack in a rock and then fr
If a rock is heated and cooled many it expands and pushes the crack further apart. W
melts later, water can get further into the crack. W
times (like in a desert), cracks form freezes again, it expands and makes the crack ev
and pieces of rock fall away.
This process of freezing and thawing can continu
crack becomes so big that a piece of rock fal
, Freeze Thaw
This is caused by physical changes such as
changes in temperature - freezing and
thawing. There are no chemical changes.
Frost Shattering (Freeze-tha
Water expands when it freezes into ice. The form
can also break rocks.
Temperature changes
When a rock gets hot it expands a
little, and when a rock gets cold
it contracts a little. If water gets into a crack in a rock and then fr
If a rock is heated and cooled many it expands and pushes the crack further apart. W
melts later, water can get further into the crack. W
times (like in a desert), cracks form freezes again, it expands and makes the crack ev
and pieces of rock fall away.
This process of freezing and thawing can continu
crack becomes so big that a piece of rock fal
, Freeze Thaw
