2. EXOGENICPROCESSESare
processes that take place at or
near the earth’s surface that
makes the surface wear away.
exogenic
processes are very destructive, they
are responsible for degradation and
sculpting the earth’s surface.
6. ICE WEDGING
ICE WEDGING
GROWTH
OF
RELEASE OF
PRESSURE ABRASION ANIMALS
PLANTS
1. ICE WEDGING ~> H2O seeps in rock, expands, crack rocks into smaller pieces.
2. RELEASE OF PRESSURE ~> Surface rock erodes, rock flakes like onion layers.
3. GROWTH OF PLANTS ~> Roots grow into cracks and push rocks apart.
4. ANIMALS ~> Burrow and push apart rock.
5. ABRASION ~> Sand and rock carried by wind, water, ice wears away surface rock when
rocks collide. Most common in windy areas
8. WATE
CARBON
DIOXIDE
LIVING
ORGANISMS
R
1. WATER ~> Water dissolves rock chemically.
2. OXYGEN ~> Rocks that has iron in it mixes with oxygen and rusts.
3. CARBON DIOXIDE ~> CO2 dissolves in rainwater and weathers marble and limestone.
4. LIVING ORGANISMS ~> Acids from plants and roots chemically weather rock.
5. ACID RAIN ~> Air pollution reacts with clouds and falls on rock as acid rain.
OXYGEN ACID RAIN
9.
10.
11.
12. EROSION BY WATER
EROSION BY GRAVITY
EROSION BY WIND
EROSION BY ICE
Erosion by water changes the shape
of coastlines. Waves constantly
crash against shores. They pound
rocks into pebbles and reduce
pebbles to sand. Water sometimes
takes sand away from beaches. This
moves the coastline farther inland.
Gravity pulls any loose
bits down the side of a hill
or mountain. Gravity
Erosion is better known
as Mass Movement.
Erosion by ice can erode the land. In
frigid areas and on some
mountaintops, glaciers move slowly
downhill and across the land. Asthey
move, they pick up everything in their
path, from tiny grains of sand to huge
boulders.
Erosion by wind carries dust,
sand, and volcanic ash from
one place to another. Wind
can sometimes blow sand
into towering dunes.
15. REGOLITH ~> When weathered rock remains in place and
remains in its pure state.
SEDIMENT ~> When weathered material is removed from the
site of weathering.
MOVING WATER ~> It is the main agent of erosion.
PEOPLE ~> Nowadays, people became one of the causes of
erosion.
WEATHERING AND EROSION ~> Weathered rock material will
be removed from its original site and transported away by a
natural agent.
16. It is a natural process in which a material is carried to the
bottom of bodies of water and forms to solid.
SEDIMENTATION
17.
18. MASS WASTING
Mass wasting is the movement of rock, soil and
regolith downward due to the action of gravity.
19. Itistriggeredbythefollowingfactors:
WATER EARTHQUAKE
Rainwater adds weight
and acts as a lubricant to
weathered material.
It is a vibration and also a
factor that triggers mass
wasting.
The lack of vegetation
cover to hold the loose
particles.
VEGETATION
REMOVAL
OVER-STEEPENED
SLOPE
Rapid movements are
commonly found in steep
slopes while slow
movements are found on
gentle slopes.
20. TYPE OF MATERIAL
Debris, mud or earth If soil and regolith dominate.
Rock When a mass of bedrock break.
TYPE OF MOTION
Fall The free fall of detached individual pieces of any size.
Slide A distinct zone of weakness separating the slide material from the more
stable underlying material.
Flow Occurs when material moves down slope as a viscous fluid.