unit: Weathering, Erosion, and Soil

the breaking down of rock due to exposure to processes that occur on earths surface

mechanical, chemical

weathering taking place without changing its chemical composition

rocks are formed deep underground

when rocks grind and scrape against one another, these rock materials are worn away

water between rocks, freezes > cracks rock

ants, earthworms, rabbits, woodchucks….dig holes in soil > allows air/water to weather it

when lichens, mosses and small plants grow on rucks, they wedge their rootsinto pores and crevices in rock > causes it to crack

when chemical reactions alter/change the minerals in a rock into different substances

hydrolysis, oxidation

chemical reaction of oxygen with other substances

chemical weathering by reaction of water

carbonic acid

is the removal and transport of materials by natural agents

rivers/streams, glaciers, wind, wave action

when sediment carried by erosion is stopped and is settled

where water is moving fast( picks up soil) when water slows down near ocean > sediment is deposited

due to constant movement of water (tides) currents, waves > make cliffs and dunes

big sheets of ice > moves collects trees and objects

when wind picks up loose particles

downward transportation of weathered materials by gravity

weight,resistance,trigger,water

very slow, slow, steady downhill flow of loose materials

mudflows, earthflows