Freeze Thaw Action
Biological Weathering
Chemical Weathering
Onion Skin Weathering
Freeze Thaw Action
When the minerals in a rock get hot they
expand and when they get cold they contract.
Over time this may cause a rock to break up.
We call this type of weathering...........
This is an example of physical weathering.
Plants can also break up rocks. If a plants
roots grow into cracks in a rock then they
may make the crack wider. Over time this may
cause the rock to break apart. This is an
example of .................
When water gets cold enough it freezes and
expands. If the water is inside cracks in rocks
when it freezes then this causes the cracks to
get deeper and wider. This is called ..............
This is an example of physical weathering.
Rain water contains dissolved gases from the
air and this makes rain water acidic. When it
rains the rainwater reacts with rocks. This is
known as .............
When the minerals in a rock get hot they
expand and when they get cold they contract.
Over time this may cause a rock to break up.
We call this type of weathering...........
This is an example of physical weathering.
Biological Weathering
Plants can also break up rocks. If a plants
roots grow into cracks in a rock then they
may make the crack wider. Over time this may
cause the rock to break apart. This is an
example of .................
Chemical Weathering
When water gets cold enough it freezes and
expands. If the water is inside cracks in rocks
when it freezes then this causes the cracks to
get deeper and wider. This is called ..............
Onion Skin Weathering
This is an example of physical weathering
Rain water contains dissolved gases from the
air and this makes rain water acidic. When it
rains the rainwater reacts with rocks. This is
known as .............