L5 : EXOGENIC PROCESSES Flashcards
processes in earth’s interior
endogenic processes
processes in earth’s outer layer
exogenic processes
is the process of disintegration (physical) and decomposition (chemical) of rocks
weathering
is a process of breaking down rocks into small particles such as sand, clay, gravel, and other fragments
weathering
2 types of weathering
mechanical (physical) weathering and chemical weathering
is also called as physical weathering
mechanical weathering
is the breakdown of rocks into pieces without any change in its composition
mechanical weathering
due to tectonic forces, granite may rise to form a mountain range.
pressure
rocks expand and are fractured when expose to high ______, however if the ______ drops to 0 degree celcius, it also expands and causes fracture.
temperature
rocks have fracture in its surface and when water accumulates in the crack and at that point freezes, the ice expands and breaks the rock part.
frost wedging
the breakdown of rocks is caused by impact and friction
abrasion
the roots grow causing penetration into the crack, expand, and in the long run, break the rock.
organic activities
activities such as digging, quarrying, denuding forests and cultivating land contribute to physical weathering.
human activities
animals like rats, rabbits and squirrels excavate into the ground to create a space for habitation
burrowing animals
it describes the process of chemicals in rainwater making changes to the minerals in a rock
chemical weathering
