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earth science
exogenic processes
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Cards (46)
geologic
processes
natural forces and mechanisms that
shape
and modify the earths
surface
overtime
geologic processes
natural
forces and mechanisms that shape and
modify
the earths surface
overtime
exogenic
exogenic processes is driven by
external
forces that operate and act on the surface of the earth
exogenic
forces
result in destruction of landforms through weathering and
erosion
exogenic
exogenic
processes
is driven by external forces that operate and act on the surface of the earth
exogenic forces result in
destruction
of landforms through weathering and
erosion
exogenic
processes
weathering is the
disintegration
and decomposition of rocks in situ (no transportation involved)
erosion
is the removal and
transportation
of material by water,
wind
,
ice
, or gravity
deposition is the
settling
of sediments into a
new
location
exogenic processes
weathering
is the disintegration and decomposition of rocks in
situ
(no transportation involved)
erosion is the
removal
and transportation of material by water, wind, ice, or gravity
deposition
is the settling of sediments into a
new
location
interconnectedness of exogenic processes
weathering
is the breaking down of rocks and minerals
erosion is the
movement
of the weathered material
decomposition
if the dropping off of the eroded material
interconnectedness of exogenic processes
weathering is the breaking
down
of rocks and minerals
erosion
is the movement of the weathered material
decomposition if the
dropping
off of the eroded material
physical
or mechanical weathering
disintegration and
reduction
of rock size without changing its
chemical
composition
physical or
mechanical
weathering
disintegration
and reduction of rock
size
without changing its chemical composition
types of physical or mechanical weathering
exfoliation
frost
wedging
salt wedging
temperature
changes
abrasion
types of physical or mechanical weathering
exfoliation
frost wedging
salt
wedging
temperature changes
abrasion
exfoliation
pressure
in a rock is released along parallel lines near the
surface
of the rock
layers of the rock break off and fall
exfoliation
pressure in a rock is released along
parallel
lines near the surface of the rock
layers
of the rock break off and fall
frost wedging
caused by
freeze
and
thaw
of water trapped between the racks of the rock
when water freezes, it expands and applies pressure to the rock forcing it to
separate
more
frost
wedging
caused by freeze and thaw of
water
trapped between the racks of the rock
when water freezes, it expands and applies pressure to the rock forcing it to
separate
more
salt wedging
occurs when
salts
cryztalize as water evaporates
as salt
crystals
grow, it applies
pressure
to the rock which weakens it, eventually the rock cracks and breaks down
salt
wedging
occurs when salts cryztalize as water
evaporates
as salt crystals grow, it applies
pressure
to the rock which weakens it, eventually the rock cracks and breaks down
temperature changes
relationship of temperature to minerals; higher temp = minerals
expand
, lower temp = minerals
contract
the gradual expansion and contraction of mineral
weakens
the rock
temperature
changes
relationship of temperature to minerals;
higher
temp = minerals expand,
lower
temp = minerals contract
the gradual expansion and contraction of mineral weakens the rock
abrasion
rocks
collide
against each other while being transported
weathers the rock surface and breaks it into smaller particles then
grains
abrasion
rocks collide against each other while being
transported
weathers the rock surface and breaks it into smaller
particles
then grains
types of weathering
physical or
mechanical
biological
chemical
types of weathering
physical
or mechanical
biological
chemical
biological
weathering
disintegration or decay of rocks caused by
chemical
or physical agents of organisms
biological weathering
disintegration
or decay of rocks caused by chemical or
physical
agents of organisms
examples of biological weathering
organic
activity
rock
disintegration
by plant growth
burrowing
and tunneling organisms
examples of biological weathering
organic
activity
rock disintegration by
plant
growth
burrowing and
tunneling
organisms
organic
activity
from lichen and algae or secretion of acids
lichen is a
symbiotic
relationship between
algae
and moss
leaches minerals from the rock causing it to weaken and breakdown
decaying of plant minerals produces
acid
that dissolves exposed rock
presence of organisms growing, expanding, and moving on the surface of a rock exerts
abrasion
and pressure
organic activity
from lichen and algae or secretion of
acids
lichen
is a symbiotic relationship between algae and
moss
leaches
minerals
from the rock causing it to weaken and breakdown
decaying of plant minerals produces acid that dissolves exposed rock
presence of
organisms
growing, expanding, and moving on the surface of a rock exerts abrasion and
pressure
rock
disintegration
by plant
growth
most common form
plant roots
penetrate
into cracks of rocks and cuases the rock to split into smaller particles
rock
disintegration by
plant
growth
most
common
form
plant roots penetrate into
cracks
of rocks and cuases the rock to split into smaller particles
burrowing and
tunneling
organisms
animals
burrow
into rocks and causes it to break down and disintegrate
small animals like
worm
and insects contribute to this
burrowing
and tunneling organisms
animals
burrow into rocks and causes it to break down and disintegrate
small animals like worm and
insects
contribute to this
chemical
weathering
involves chanegs of chemical composition of
weathered
material
chemical weathering
involves chanegs of
chemical
composition of weathered material
processes of chemcial weathering
hydrolysis
hydration
oxidation
carbonation
processes of chemcial weathering
hydrolysis
hydration
oxidation
carbonation
hydrolysis
reaction between mineral and
water
ions
results to rock surface
decomposition
by forming new compounds and by increasing the solution
pH
silicate minerals form
clay
hydrolysis
reaction between
mineral
and water ions
results to rock surface
decomposition
by forming new
compounds
and by increasing the solution pH
silicate
minerals form clay
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