1.1.5 Flashcards
what are the 3 SUBAERIAL processes of weathering?
PHYSICAL, CHEMICAL and BIOTIC
give me three types of PHYSICAL weathering
FREEZE THAW, CRYSTALLISATION and WETTING + DRYING
what is freeze thaw weathering?
when water freezes it EXPANDS so when in cracks this creates a breaking force and widens the gap
what is the process of WETTING+DRYING?
CLAY RICH soils will EXPAND when WET and then CONTRACT when DRY
give me three types of CHEMICAL weathering
CARBONATION, HYDROLYSIS and OXIDATION
give me three types of BIOTIC weathering
PLANT ROOTS and ROCK BORING (making holes)
what is CARBONATION?
slow DISSOLUTION of LIMESTONE due to RAIN
what is HYDROLYSIS?
BREAKDOWN of materials to from NEW CLAY minerals due to WATER and DISSOLVED CO2
what is OXIDATION?
the ADDITION of OXYGEN to materials- INCREASES VOLUME
what is ROCK BORING?
when species of CLAMS and MOLLUSCS make holes, ‘BORE’ into rocks and can sometimes SECRETE chemicals which DISSOLVE it
name 4 types of MASS MOVEMENT
LANDSLIDES, ROCK FALLS, MUDSLIDES and SLUMPING
what are LANDSLIDES?
movement of MASSES OF LAND down a slope due to DISTURBANCE in STABILITY
what are ROCKFALLS?
FRAGMENTS of rock fall FREELY from a cliff due to WEATHERING
what are MUDSLIDES?
LIQUIDFIED DIRT due to SATURATION of soil from RAINFALL
what is SLUMPING?
the DOWNWARD movement of rock due to SATURATED SOIL, causing it to SLUMP
