Weathering Flashcards
what is weathering
wearing away of rocks and soil
what does weathering affect
shape and composition of rocks and soil
what are agents
natural forces that cause an effect or result
what are three types of weathering
physical weathering, chemical weathering and biological weathering
whats physicals weathering
physical forces such as frost and temperature change
what is chemical weathering
chemical changes that weaken rocks
what is biological weathering
action of plants and animals
what are two examples of physical weathering?
freeze that and exfoliation
what is exfoliation
the removal of the outer layer of a rock
when does river erosion happen
when river flows over land
explain how a waterfall forms
- river flows over bands of hard and soft rocks
- the river undercuts had rocks leaving an overhang
3.overhang collapses into plunge pool
what is a meander formed by
deposition and erosion
how do meanders form
water flows faster on the outside of bend which erodes faster. deposition occurs on inside of bend where river flows slower.