learn about the exogenic processes of the earth

1. Exogenic Process

2. Exogenic Process
• Are processes that takes place at or near the earth’s
surface that makes the surface wear away.
• Exogenic processes are very destructive, they are
responsible for degredation and sculpting the earth’s
surface.

3. Types of Exogenic Process
• Weathering
• Erosion
• Mass wasting
• Sedimentation

4. Weathering
• The process that breaks down large rocks into smaller
pieces.

5. The Physical Weathering
• Physical waeathering happens when the rock is physically
broken in to smaller pieces.

6. Factors that affect physical weathering
• Ice wedging- H20 seepes in rock, expand, crack rocks
into smaller pieces.
• Release of pressure- Surface rock erodes, rock flakes like
onion layers.
• Growth of Plant- rocks grow into cracks and push rocks
apart.
• Animals- burrow and push apart rock
• Abrasion- sand and rock carried by wind, water, ice wears
away surface rock when rocks collide. Most common in
windy areas.

7. Chemical weathering
• Is the process of breaking down rock through chemical
changes.

8. Factors that affect chemical weathering
• Water- water dissolves rock chemically.
• Oxygen- Rocks that has iron in it mixes with oxygen and
rust.
• Carbon dioxide- CO2 dissolves in rainwater and weathers
marble and limstones.
• Living Organisms- Acids from plants and roots chemically
weather rock.
• Acid Rain- air pollution reacts with clouds and falls on
rocks as acid rain.

9. Physical vs. Chemical Weathering
• Physical weathering refers to the disintegration or
disaggregation of rocks by physically breaking them apart.
• Chemical weathering refers to the decomposition of rocks
and minerals as chemical reactions alter them into new
substances.

10. Erosion
• Rock particles that are carried away by the wind, ice &
gravity

11. Agents of Erosion
• Water
• Wind
• Ice
• Gravity

12. Erosion by water
• Erosion by water changes the shape of the coastline,
waves constantly crash against shore.
• They pound into pebbles and reduce pebbles into sand,
water sometimes take sand away.

13. 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.

14. Erosion by Ice
• Erosion by ice can erode the land. in frigid areas and
on some mountain tops.
• 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 of rocks.

15. Erosion by Gravity
• Gravity pulls any loose bits down the side of a hill or
mountain.
• Gravity erosion is better known as mass movement.

16. Sedimentation
• It is a natural process in which a material is carried to the
bottom of bodies of water and forms to solid.

17. Mass Wasting
• Is the movement of rocks, soil, and regolith downward
due to the action of gravity.

18. • Slump
• Solifluction
• Earth Flows
• Mud Flows
• Debris slide
• Debris flow
• Rock fall
• Soil Creep.

19. Slump
• Is a type of mass wasting that resultd in the sliding of
coherent rock materials along a curved surface.

20. Solifluction
• Is the slow downhill flow of soil.

21. Earth Flow
• Is a downslope viscous flow of fine grained materials that
have been saturated with water and moves under the pull
of gravity.

22. Mudflow
• Occurs when mud travels down a slope very quickly.

23. Debris Flow
• Is a moving mass of loose mud, sand, soil, rock, water,
and air that travels down a slope under the influence of
gravity.

24. Debris Slide
• Is a type of slide characterized by the chaotic movement
of rocks, soil, and debris mixed with water and or/ soil.

25. Rock Flow
• Occurs when pieces of rocks break loose from a steep
rock face or cliff.

26. Soil Creep
• A slow, gradual movement of soil or regolith downhill over
time.