Physical and Chemical Weathering of Rock
The rock cycle is driven, in part, by the physical and chemical weathering of rocks already on Earth. There are 2 types of weathering.
One is physical weathering: the process that breaks rocks apart without changing their chemical composition. The other is chemical
weathering: the erosion of rocks caused by chemical reactions (chiefly with water and substances dissolved in it).
Sort the examples as ways rock is physically broken down or chemically changed.
Physical Weathering
Chemical Weathering
Acid rain dissolving
rock
Ice wedging
Reaction with
oxygen
When rain grabs CO2
& it seeps into rock
Plant roots growing
into rock
Water chemically
reacting with rock
Abrasion~ rock
hitting other rock
Thermal (heat)
expansion