Geomorphology Flashcards
what is weathering
the breakdown of rock
what is freeze thaw weathering
frost shattering when water gets into a crak of a rock, it freezes, expands and contracts.
what is onion slin weathering
happens in very hot areas when rock expands in day time, contracts at night then rock peels off
whatis chemical weatheirng and what is the anem of the example
when acid rain attacks limestone, gradually dissolving away, its called carbonation
what is Biological weatheirng
actions of plants and animals
what is abrasion
sand and stones scraping bed banks like sandpaper
What is attrition
Rocks and stones knock togethor and wear eachother away
What is solution
Dissolved masterial carried as a solution
WHat is Suspension
Small particels of rock carried
What is Saltation
Heavier MAterial carried along
How do V shaped valleys develop
river being cut downwards, weather attacks sides at top, causing a downwards v shaped river.
How can you control a flood
Build embankments or dams to regulate river flow
how does longshire drift work
swash of waves carries material up the beach and the backwash carries material back down
when does longshore drift occur
when waves meet the shore at an angle
