Exogenic processes are processes that take place at or near the Earth's surface and cause weathering and erosion. There are four main types: weathering, erosion, mass wasting, and sedimentation. Weathering breaks down rocks into smaller pieces through mechanical and chemical processes. Mechanical weathering breaks rocks down physically without changing their composition, while chemical weathering changes the rocks' composition through oxidation, dissolution, and hydrolysis. The major agents of erosion are water, wind, ice, and gravity, each of which shapes the landscape in different ways.

2. PREPARED BY: PAULA CARMELA MENDOZA
JOYCE PANANGUI

3. 1. TEAWINGHER –
ANSWER: WEATHERING
1. SCOSPRE –
ANSWER: PROCESS
1. FZEERE–
ANSWER: FREEZE
1. MILACCHE–
ANSWER: CHEMICAL
1. HYSACILP RO NICEMCHALA –
ANSWER: PHYSICAL OR MECHANICAL
Let’s try to answer this one;

4. What is exogenic processes?
Exogenic processes are process 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 Degration and
sculpting the Earth’s surface.

5. TYPES OF EXOGENIC PROCESSES
• WEATHERING,
•EROSION,
•MASS WASTING AND
•SEDIMENTATION

6. WEATHERING
•The process that breaks down rock into
smaller pieces.
•Weathering is the process of disintegration
(physical) and decomposition (chemical) of
rocks, breaking down Of rocks into smaller
particles.

7. There are two types of weathering;
•Mechanical (physical) weathering
• Chemical weathering

8. • Mechanical (physical weathering)
breaking down of rocks without
changing its composition.

9. FACTOR THAT AFFECTS PHYSICAL WEATHERING;
• Ice wedging
• Release pressure
• Growth of plants
• Animals
• Abrasion

10. ICE WEDGING (FROST WEDGING)
•H2O seeps in rock, expand,
crack rock into smaller piece.
•when water gets inside the
joints, alternate freezing and
thawing episodes the rock
apart.

11. RELEASE PRESSURE
Surface rock erodes, rock
flakes like onion layers.

12. GROWTH OF PLANTS
Roots grow into cracks,
and push rocks apart.

13. ANIMALS
Burrow and
push apart
rocks.

14. ABRASION
Sand and rock carried by wind, water, ice
wears away Surface rocs when rocks
collide. Most common in windy area.

15. • Salt crystal growth- force exerted by salt
crystal that formed as water evaporates
from pore spaces or cracks in rocks can
cause the rock to fall apart

16. Biological activities
plants and animals as agents of mechanical
weathering

17. •There are changes in
composition of rocks due
to chemical reaction

18. Major process of chemical weathering?
The major process of chemical weathering include: oxidization, dissolution, hydrolysis.

19. Oxidation is a reaction with oxygen to form an oxide.
hydrolysis is reaction with water, and carbonation is a reaction with CO2 to form a
carbonate. In hydrolysis, the chemical bonds of a mineral are broken down by water,
creating a decomposition reaction.
hydro- means water and -lysis means decomposition.
Dissolution- This process occurs when water comes into contact with rocks and dissolves
the minerals that make up that rock into individual elements.

20. FACTORS THAT AFFECT THE TYPE, EXTENT, AND
RATE AT WHICH WEATHERING TAKES PLACE:
a. Climate - areas that are cold and dry tend to have slow rates of chemical weathering and
weathering is mostly physical; chemical weathering is most active in areas with high
temperature and rainfall
b. Rock type - the minerals that constitute rocks have different susceptibilities to weathering.
Those that are most stable to surface conditions will be the most resistant to weathering.
Thus, olivine for example which crystallizes at high temperature conditions will weather first
than quartz which crystallizes at lower temperature conditions.
c. Rock structure-rate of weathering is affected by the presence of joints, folds, faults, bedding
planes through which agents of weathering enter a rock mass. Highly-jointed/fractured rocks
disintegrate faster than a solid mass of rock of the same dimension.
d. . Topography-weathering occurs more quickly on a steep slope than on a gentle one e. Time-
length of exposure to agents of weather determines the degree of weathering of a rock

22. SUMMARY
Exogenic processes are process that take place at or near the Earth’s surface that makes
the Surface wear away.
Types of exogenic processes are; weathering, erosion, mass wasting and
sedimentation.
Weathering is The process that breaks down rock into smaller pieces. There are two
types of weathering. The mechanical and chemical weathering.
Mechanical (physical weathering) breaking down of rocks without changing its
composition. Ice wedging, release pressure, Growth of plant, animal, abrasion,
Crystal salt growth and biological activities are the factors that affect physical
weathering.

23. Chemical weathering There are changes in composition of rocks due to chemical
reaction.
The major process of chemical weathering include: oxidization, dissolution,
hydrolysis.

25. AGENTS OF EROSION
• Water
• Wind
• Ice
• Gravity

26. EROSION BY WATER
EROSION BY WATER
Erosion by water changes the shape of
geallines. Waves constantly ergh gainst
shores. They pound ocks into pebbles and
reduce ebbles to sand. Water sometimes
kes sand away from beaches. This maves
the coastline farther inland.

27. EROSION BY WIND
EROSION BY WIND
Erosion by wind carries dust,
sand, and volcanic ash from one
place to another. Wind can
sometimes blow sand into
towering dunes.

28. EROSION BY ICE
EROSION BY ICE
ice can rode the land. In frigid areas and on some
Erosion by mountaintops, glaciers move slowly
downhill and across the land. As they move, they
pick up everything in their path, from tiny grains of
sand to huge boulders.

29. EROSION BY GRAVITY
EROSION BY GRAVITY
Gravity pulls any loose bits down
the side of a hill or mountain.
Gravity Erosion is better known as
Mass Movement.