問題一覧
1
occur at subduction zones at destructive plate boundaries
megathrust earthquake
2
outermost layer of the earth
crust
3
what is the other term of earthquake?
quake, tremor or temblor
4
The crust is made of what material?
basalt and granite
5
the philippines is situated in a tectonically active region called
Pacific Ring of fire
6
what makes oceanic crust denser?
sea water
7
what are the zone 4
the rest of the country
8
on the land where we live
continental crust
9
what is the temperature of outer core?
4000 to 5000+ degrees C
10
it is less dense, thicker, and mainly composed of granite
continental crust
11
in what century that the continental drift published?
20th century
12
what are the 3 stresses that relates to types of faulting
tension stress, compression stress, shear stress
13
crack or fracture in the earth’s crust that occurs due to the release of accumulated energy
fault
14
3 types of earthquake
tectonic earthquake, volcanic earthquake, deep earthquake
15
where are the major fault lines in the philippines
ilocos region, nueva ecija, quezon province, masbate, leyte, caraga region, davao gulf, davao oriental
16
an instrument that detects earthquakes
seismograph
17
these are the areas near active fault lines that are most prone to earthquake or seismic activity
zone 4
18
this theory explains that the continental landmasses were drifting
continental drift theory
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these are the areas that experience very little ground acceleration
zone 2
20
it is made up to iron and nickel
inner core
21
surface of the earth
crust
22
how far does the tectonic feature (philippine fault zone) that runs across the country
1200 km
23
when 2 ground masses move with respect to one another
faulting
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is the trend of the line formed by intersection of a fault plane and a horizontal plane, such as the ground surface or a map surface
strike
25
the archipelago is surrounded by subducting tectonic plates, what are the two plates
philippine sea plate in the east and eurasian plate in the west
26
can be used to determine the location, origin time, and magnitude
seismograms
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hanging wall moves up and the foot wall moves down
reverse fault
28
The outer core is important to earth as it creates something called?
magnetic field
29
what wave that the earthquake creates?
seismic waves
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dip literally means
slope or inclination
31
is the plane that represents the fracture surface of a fault
fault plane
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types of compression stress that the crust can thicken or shorten
horizontal compression stress
33
thrust fault is when the earth is under of what stress?
compressive stress
34
is a type of stress that causes the rocks to push or squeeze against one another
compression stress
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the philippine fault zone starts from and ends in?
northwestern luzon and southeastern mindanao
36
these are the areas that are experience some ground acceleration
zone 3
37
type of stress that the force of the stress pushes some of the crust in different directions
shear stress
38
occur when two plates slide towards to from either a subduction zone
convergent boundaries
39
describes an area with particular level of hazard due to earthquakes
seismic hazard zone
40
is the angle between a horizontal surface and fault plane
dip
41
occur when two lithospheric plates slides, or perhaps more accurately, grind past each other
transform boundaries
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associated with volcanic eruption or subterranean movement of magma
volcanic earthquake
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one explanation for why we experience several destructive quake is the existence of?
philippine fault zone
44
what is the famous fault in the world?
San Andreas Fault
45
it is used to describe any seismic event whether a natural phenomenon or event cause by humans
earthquake
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used to describe an area where earthquakes tend to focus
seismic zone
47
define ground shaking caused by the sudden release of energy in earth’s crust?
earthquake
48
rocks along a fault tend to move in opposite directions
faulting
49
what is the average of earthquakes are recorded daily in the philippines
20
50
it is also called continental collision
convergent boundaries
51
what is the 4 layers of mantle?
lithosphere, asthenosphere, upper mantle, lower mantle
52
the fault plane lies at a low angle to the earth’s surface
thrust fault
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is a service institute of the DOST
philippine institute of volcanology and seismology
54
occur when two plate slide apart from each other.
divergent boundaries
55
faults commonly forms in what?
plate boundaries
56
deep earthquake with what focal depths?
greater than 300km to 700km
57
caused by the sudden slippage along a fault or line of dislocation in the outer part of the earth
tectonic earthquake
58
the theory of continental drift is most associated with whom?
Alfred Wegener
59
what provinces covers the zone 2
palawan, sulu, tawi-tawi
60
it results in the formation of block mountains and river valleys
faulting
61
Many earthquakes are caused by movement on faults that have components of both dip slip and strike slip
oblique slip fault
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DOST-PHIVOLCS operates and maintains of how many networks?
104 seismic stations
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Artificially induced earthquake
collapse of caverns or mine workings, injections of fluids into deep wells, detonation of large underground nuclear explotions, quarrying blasting
64
the hanging wall moves down and the foot wall moves up when the relative movement is in an upward and downward direction on a nearly vertical fault plane.
normal fault
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the thrust fault that does not extend all the way of earth’s surface.
blind thrust
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the crust varies from around from what thick in the ocean floor and continental crust?
5km and 70km
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is the block above the fault plane
hanging wall
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Wegener was convinced that all of earth’s continents were once part of an enormous, single landmass called?
pangaea
69
the inner core is so deep within the earth that it’s under?
immense pressure
70
this occurs on an approximate vertical fault plane as the rock on one side of the fault slide horizontally past the other
strike-slip fault
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at what zone does fge divergent b pi boundaries occur?
ocean to ocean rifting
72
It is consist of hot, dense, iron and magnesium rich solid rock?
mantle
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happens when the earth’s crust completely breaks and slides paet each other
faulting
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This is the outside layer of the earth
crust
75
theory of plate tectonics came from ancient greek tektovikos means?
pertaining to building
76
the boundaries of the plates are the weak zones where earthquakes are more likely to occur it is also known as
seismic or fault zones
77
what are the types of fault
normal fault, reverse fault, strike-slip fault
78
fracture on earth’s crust or breaks in rocks along which there is displacement of rocks on one side relative to the order
fault
79
It is a scientific theory describing the large scale motion of seven large plates and the movements of a larger numbers of smaller plates
theory of plate tectonics
80
the mantle lies below the crust is up to what km thick?
2900 km
81
tectonic processes began on earth between what year
3.3 and 3.5 billion years ago
82
it detects and measure earth’s ground motion
seismic station
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it is formed by seafloor spreading, allowing for the transformation of new ocean basin
divergent boundaries
84
it is a type of forces that pull the rocks apart
tension stress
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occurs along convergent boundaries
reverse fault
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these are the areas that least prone to earthquakes or seismic activity
zone 1
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this oocurs when the fault is at an angle to the surface of the earth and the movement of the rocks is up or down
dip-slip fault
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is the block below the fault plane
foot wall
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Theory of plate tectonics came from the latin word
tectonicus
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is a place where the fault can be seen or mapped on the surface
fault trace or fault line
91
what are the most notable fault lines in the philippines
guinayangan fault, masbate fault, vigan-aggao fault, marikina valley fault
92
what are the 4 plate boundaries?
divergent boundaries, convergent boundaries, transform boundaries, megathrust earthquake
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type of compression stress that the crust can thin out or break off
vertical compression stress
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utilizes sensitive seismographs to record the ground motion from seismic waves created by earthquakes or other sources
seismic monitoring
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what are the two seismic zone in the Philippines
zone 2 and zone 4