Exogenic Processes Flashcards
ARE PROCESSES THAT TAKE PLACE AT OR NEAR THE EARTH’S SURFACE THAT MAKES THE SURFACE WEAR AWAY. __________ARE VERY DESTRUCTIVE, THEY ARE RESPONSIBLE FOR DEGRADATION AND SCULPTING THE EARTH’S SURFACE.
EXOGENIC PROCESSES
TYPES OF EXOGENIC PROCESSES
(WEATHERING, EROSION, MASS WASTING AND SEDIMENTATION)
happens when rock is physically broken into smaller pieces.
physical weathering
FACTORS THAT AFFECT PHYSICAL WEATHERING
Ice wedging
Release of pressure
Growth of plants
Animals
Abrasion
H2O seeps in rock, expands, crack rocks into smaller pieces.
ice wedging
Surface rock erodes, rock flakes like onion layers.
release of pressure
Roots grow into cracks and push rocks apart.
growth of plants
Burrow and push apart rock.
animals
Sand and rock carried by wind, water, ice wears away surface rock when rocks collide. Most common in windy areas
abrasion
is the process of breaking down rock through chemical changes.
chemical weathering
FACTORS THAT AFFECT CHEMICAL WEATHERING
water
oxygen
carbon dioxide
living organisms
acid rain
dissolves rock chemically.
water
Rocks that has iron in it mixes with oxygen and rusts.
oxygen
CO2 dissolves in rainwater and weathers marble and limestone.
carbon dioxide
Acids from plants and roots chemically weather rock.
living organisms
Air pollution reacts with clouds and falls on rock as _____
Acid rain
Agents of Erosion
water, wind, ice and gravity
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.
erosion by water
carries dust, sand, and volcanic ash from one place to another. _____can sometimes blow sand into towering dunes.
erosion by wind
can erode the land. In frigid areas and on some 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.
erosion by ice
pulls any loose bits down the side of a hill or mountain. _____Erosion is better known as Mass Movement.
erosion by gravity
When weathered rock remains in place and remains in its pure state.
rigolith
When weathered material is removed from the site of weathering
sediment
It is the main agent of erosion. PEOPLE ~> Nowadays, people became one of the causes of erosion.
moving water
Weathered rock material will be removed from its original site and transported away by a natural agent.
WEATHERING AND EROSION
It is a natural process in which a material is carried to the bottom of bodies of water and forms to solid.
sedimentation
is the movement of rock, soil and regolith downward due to action of gravity
mass wasting
is a type of mass wasting that results in the sliding of coherent rock materials along a curved surface.
slump
is the slow downhill flow of soil.
solifluction
is a downslope viscous flow of fine-grained materials that have been saturated with water and moves under the pull of gravity.
earthflow
occurs when mud travels down a slope very quickly.
mudflow
is a type of slide characterized by the chaotic movement of rocks, soil, and debris mixed with water and/or ice.
debris slide
is a moving mass of loose mud, sand, soil, rock, water and air that travels down a slope under the influence of gravity.
debris flow
occurs when pieces of rock break loose from a steep rock face or cliff.
rock flow
is a slow, gradual movement of soil or regolith downhill over time.
soil creep
rubble, trash, random material like large pieces of wood metal or plastic
debris
river of flowing mid
slurry
an incline like slide or ramp
slope
land that is close to a coast or near water or sea levels
low lying area
