Lesson Flashcards
Natural forces that influence the shape and structure of the planet
Geologic Processes
2 categories of Geologic Process
Exogenous and Endogenous
this geologic process occur on or near the surface of the earth
Exogenous Process
this are natural occurrences that leave significant changes on landscape
Exogenous Process
Enumerate atleast 2 exogenous process
Weathering; Mass Wasting; Erosion; Sedimentation
this is the breaking down of rocks through contact with Earth’s atmosphere, water, and biological organisms
Weathering
Enumerate the effects of weathering
- loss of atom and molecules from weathered surfaces
- addition of specific atoms to the weathered surface
- breakdown of one mass into two or more masses
Enumerate the types of weathering
physical weathering; chemical weathering; biological weathering
the breakdown of rocks by mechanical forces concentrated along rock features
Physical Weathering
this type of weathering occurs in high temperature
chemical weathering
the breakdown of rock caused by its reaction to water
hydrolysis
when acidic water produce clay and soluble salts
hydrolysis
soluble materials in rock are dissolved by water
dissolution
this weathering happens when rocks are worn out away by living organisms
biological weathering
this is the repeated cooling and heating
Thermal expansion
2 main reason why the interior of the Earth is very hot
Primordial Heat and Radiogenic Heat
the internal heat energy accumulated by dissipation
primordial heat
this heat is the result of spontaneous nuclear disintegration
Radiogenic heat
this refers to the heat energy that existed in the early universe
primordial heat
this process is caused by force from within the interior of the Earth
endogenous processes
is process is responsible for earthquake, development of continents, mountain building, and volcanic activities
endogenous processes
this is the formation of magma
magmatism
these are molten rock materials
magma
this is the eruption of molten rock from inside the earth to the surface
volcanism
this is the process of changing the materials that make up a rock
metamorphism
in some cases this process can wipe out majority of the organisms inhabiting a region
exogenous processes
different process that results in chemical weathering
hydrolysis; dissolution; oxidation
this heat energy is thought to have been created by the high energy particles and radiation that was present in the early universe and is thought to have played a significant role in the formation of the first stars and galaxies
primordial heat
what are the main contributions to the primordial heat?
accretional energy and differentiation energy
this energy is deposited by infalling planetesimals
accretional energy
this is an endogenic process which occurs when there is pressure and heat applied to geologic structures which leads to the formation of rocks
metamorphism
types of endogenous process
volcanism; metamorphism; magmatism; faulting; folding
this endogenic process happens when magma is generated and develops into igneous rocks
magmatism
this endogenic process occurs because of earth’s internal heat and is associated with tectonic processes and the part of the rock cycle
volcanism
types of metamorphism
contact metamorphism and regional metamorphism
is the displacement of rocks and the tensional forces are created
faulting
are fissures that starts appearing when tensional forces are applied in opposite direction to displace
faults
this is the turns and bends form in the rocks due to compressional forces
folding
is a type of metamorphism where rock minerals and textures are changed, mainly by heat, due to contact with magma
contact metamorphism
type of metamorphism where rock minerals and textures are changed by heat and pressure over a wide area or region
regional metamorphism
this produces volcanoes in the middle of a plate where magma rises upward until it erupts on the seafloor
hotspot
what do you call when a magma reaches the surface of the earth?
lava
this process usually happens when magma form
volcanism
what is the first source of heat?
through the accretion of the planet
main source of heat
radiogenic heat
the most easily observed kind of chemical weathering
dissolution
another kind of chemical weathering that occurs when oxygen combines with other substance and creates compounds called oxides
oxidation
this kind of chemical weathering involves the reaction between mineral ions and ions of water
hydrolysis