`Recall
Notes
42 – Weathering- _________________ of rock due to exposure
to the ______________________.
43- Weathering involves ________ processes.
43- ____________________
43- ______________________ (Physical)
43- Chemical- (decomposition)- Some of the rock’s minerals
are turned into a ___________________ substance.
5 causes of chemical Weathering:
-______________________
-______________________
-__________________________________
-__________________________________
-__________________________________
3 Types of chemical weathering:
Dissolution- Compounds are ____________________
(Limestone to caves)
Oxidation- Mineral ions combine with oxygen which
creates ___________________________
Hydrolysis- ________________ rain reacts with rockforming minerals such as ___________________ to
produce _______________ and ________________ that
are removed in solution.
43 –_______________________ Weathering – Disintegration:
___________________________ __________________ down
the rocks _____________________ changing the chemical
make-up.
4 main sources of mechanical weathering
- ________________
- ________________
- ________________
- ________________
43 KEY POINT: If a particle is loosened by weathering and
stays put, it is weathering. If it begins to move it is erosion.
Mechanical weathering can be erosional.
Types of mechanical weathering:
-frost ____________________- freezing and thawing of
water causes rocks to crack.
-___________________________- peeling off of sheets of
rock layers
-crystal growth wedging- involves
_____________________ crystals growing from salty
waters
-___________________ penetration- Strong plant roots
grow into the rocks which causes ___________________
-____________________- Wind and water can cause
rock fragments to bounce off of each other breaking
down the rocks.
-_________________________ Weathering- Ice and rock
interact
-Other agents of weathering: flash floods, mud slides,
and land slides