it gets larger because it absorves water
If rain water seeps into cracks in rocks, and becomes frozen, the water turns to ice. As the ice expands it can force the cracks wider, even splitting the rock in two.
Water seeps into cracks in the rock, and when freezing occurs, the water expands, thus making the crack slightly larger. This process is called mechanical weathering.
the water freezes and then cracks the rock
Water expands when it freezes, therefore it tends to cause the rocks to crack (or perhaps I should say, it causes existing cracks to get larger, leading to the disintegration of the rock).
chemical weathering
Frozen water molecules are larger and expand. In liquid form H2O is smaller
Cryoseisms are caused by cracking actions in frozen rock or soil. Water enters the rock, freezes and expands The expansion builds up until the rock cracks
The rock cracks and weathers.
If rain water seeps into cracks in rocks, and becomes frozen, the water turns to ice. As the ice expands it can force the cracks wider, even splitting the rock in two.
Weathering is the process which breaks rocks into smaller bits. This is one type of weatheringPhysical weathering is a physical action which breaks up rocks : An example of this is called freeze-thaw weathering when water gets into tiny cracks in rocks. When the water freezes it expands, if this is repeated the crack grows and bits eventually break off.
the water freezes and then cracks the rock
Water seeps into cracks in the rock, and when freezing occurs, the water expands, thus making the crack slightly larger. This process is called mechanical weathering.
It cracks the rock
Water expands when it freezes, therefore it tends to cause the rocks to crack (or perhaps I should say, it causes existing cracks to get larger, leading to the disintegration of the rock).
When cement is frozen it shrinks. the salt adds heat and it expands. The cement is not used to the change and it expands to much and it cracks. just like when paper rips. =============================== I have a different mechanism to propose: -- Salt on the surface of the frozen rock melts the fine layer of ice on the rock, just as it does when salt is used on the roads or sidewalks. -- The liquid water seeps into microscopic cracks in the cement. -- When the water re-freezes, it expands, cracking the cement.
chemical weathering
Erosion.