ch 27 weathering and soiL Flashcards
weathering
is the process that evolves the physical or chemical breakdowns of earth chemicals
soil
s a mixture of weathered rock, organic matter, water , and air that is capable of supporting plant life
erosion
is the removal of surface material through the process of weathering
sediment transport
as rocks weather , erosion agents like water ice and wind and gravity
deposition
it drops this sediment load of proboscis called deposit-an
drainage basin
the land area that gathers water for a major river is called a rivers basin
long shore current
the movement of water apparel to the shore line as a longshore
what is weathering
break down of materials on earths surface
do rocks weather at the same rate
no they do not the location make the difference
what are the two main factors that deter main how fast a rock will weather
rock type and landscpe
what are the two types of weathering
mechanical weathering and chemical weathering
what type of change happens with mechanical weathering
phishical changes
what type of change happens with chemical weathering ?
chemical changes
what are the three specific types of mechanical weathering ?
frost wedging , biological , collisions
what are the causes of frost wedging
water getting between the cracks in a rock and freezing , and they are called freeze thaw cycles
what is the cycle called during frost wedging
the cecal is called freeze thaw
what causes biological activity
when a plant roots itself and can cause the rock and segment to make it crack more such animals do to make the burrows
what causes weathering during collisions
when rocks fall from cliffs and or tumble
what is soil
is a mixture f rock , organic matter, water ,and air these are the things that make up soil
what is a parent material
this is the material that soil forms from
what are soil horizons
they are the different lays of soil
how many soil horizons are there
there are 6 different horizons
true or false. all soils contain every soil horizon
false
what are the specific soil horizons
O ,A, E, B, C ,R horizons
what dose the first soil horizon contain
it contains organic materiel
what is the second horizon mostly made up of ?
mostly materials
which layer does leaching occur ?
horizons e
which horizon collects materials from precious horizons ?
horizons b
which layer is partially weathered bedrock ?
horizon c
which layer is weathered bedrock
horizon d
which layer is unweathered bedrock
horizon r
which soil horizons make up the topsoil
o and a horizon
which soil horizons make up the subsoil
e and b make up the supsoil
what is a cirque
bowl shaped basin
arete
from where two ablative valley
what is a horn
they are sharpend peaks
what do tributetary glacers create
hanging valleys
what are tributary glacers
they are small and large glacers
what shape of valleys fo glacers create
u shaped valleys
