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WorksheetsWORKSHEET 4 - DRRM (GRADE 12)
Total questions: 25
Worksheet time: 14mins
Disruptive up and down, and sideways motion experienced during an earthquake
Ground shaking
Ground rupture
Landslides
Liquefaction
Tsunami
Series of waves commonly caused by an earthquake under the sea
Ground shaking
Ground rupture
Landslides
Liquefaction
Tsunami
Downslope movement of rock and other debris due to violent shaking
Ground shaking
Ground rupture
Landslides
Liquefaction
Tsunami
Why is the Philippines prone to frequent and active earthquakes and volcanic eruptions?
Because it is along the Typhoon Belt
Because of the movement of the Western edge
Because it is near the Pacific Ring of Fire
Because of the Philippine Fault System
Which is the correct order for the layers of the earth?
Inner mantle, outer mantle, core, outer core
Crust, mantle, outer core, inner core
Crust, core, mantle, outer core
Where would the most damage be caused in an earthquake?
Close to the epicentre
Far away from the epicenter
In rural areas
Countries around the Pacific Ring of Fire are more at risk of what types of natural hazard?
Earthquakes and volcanic eruptions
Earthquakes and flooding
Volcanic eruptions and drought
Volcanoes and forest fires
Natural events like volcanic eruptions or landslides can
also shake the ground tremendously
Ground Shaking
Tsunami
Volcanic eruptions and drought
Volcanoes and forest fires
When was the tremendous Luzon Earthquake happened?
1990
1991
1992
1993
Builds up in the deforming rocks on either side of the fault until it overcomes the resistance posed by any irregularity on the fault plane.
Elastic Strain Energy
Elastic Strap Energy
Elastic Strand Energy
Elastic Storm Energy
Is hindered because there are irregularities on the fault
plane.
Elastic Strain Energy
Slippage
Fault line
Ground Shaking
This theory was discovered by making measurements at a number of points across faults
Elastic Rebound Theory
Elastic Strain Theory
Elastic Fault Theory
Elastic Ground Theory
This waves can travel through fluids and solids which are longitudinal.
primary waves
secondary waves
tertiary waves
tidal waves
Final type of seismic wave occurs along the boundary
between two different substances,Can be either longitudinal (Rayleigh) or transverse
(Love and Rayleigh)
True
False
Not so True
Surface waves are slower than both S and P waves, but have a higher amplitude and so can be the most destructive of all the seismic waves
True
False
Not so True
The strength of ground shaking ismeasured in terms of velocity,
accelerations, frequency content ofthe shaking, and how the shaking
continues (duration).
True
False
Not so True
Frequency is how often a vibration occurs. The unit of measurement is hertz (Hz) or cycles per second. The product of wavelength
and frequency is velocity
True
False
Not so True
Natural Frequency is the frequency at which a system naturally vibrates once it has been set into motion.
True
False
Not so True
The product of wavelength
and frequency is (a)
The frequency at which a system naturally vibrates once it has been set into motion. The natural frequency depends on the stiffness and mass of the system
(a)
The frequency at which a system naturally vibrates once it has been set into motion. The natural frequency depends on the stiffness and mass of the system
(a)
The time (in seconds) it takes for one full cycle to occur. The period is equal to the reciprocal
for frequency (1/frequency)
(a)
The time (in seconds) it takes for one full cycle to occur. The period is equal to the reciprocal
for frequency (1/frequency)
(a)
