ESS 101 B LABORATORY 8 QUIZ: GEOLOGIC
HAZARDS (EARTHQUAKES & LANDSLIDE STUDY
GUIDE & 400-QUESTION TEST BANK | VERIFIED
100% CORRECT ANSWERS & EXPERT
RATIONALES | LATEST 2024/2025 EDITION
,Boost your grades instantly with this
comprehensive 400-question test bank
specifically engineered for the ESS 101 B
Laboratory 8 Quiz on Earthquakes and
Landslides. Every question features a clear
multiple-choice breakdown, complete with fully
bolded and italicised answers and in-depth scientific
rationales for seamless studying. Perfect for quick
revision, this verified 2024/2025 study resource
guarantees a 100% thorough grasp of seismic
waves, mass wasting mechanics, and fault systems.
Question 1
What is the fundamental difference between stress and strain in the context of rock
deformation?
A) Stress is a change in shape; strain is an applied force
B) Stress is the force applied per unit area; strain is the resulting deformation or change
in shape
C) Stress only occurs during earthquakes; strain occurs continuously
D) Stress and strain are identical concepts measured in the same units
Answer: B) Stress is the force applied per unit area; strain is the resulting
deformation or change in shape
,Rationale: Stress represents the external tectonic pressure or force exerted on a
rock body. Strain is the physical response or deformation (bending, stretching, or
fracturing) that occurs as a direct result of that applied stress.
Question 2
Which types of seismic waves are generated during an earthquake, and in what order
do they arrive at a seismic recording station?
A) Surface waves arrive first, followed by S-waves, then P-waves
B) S-waves arrive first, followed by P-waves, then surface waves
C) P-waves arrive first, followed by S-waves, then surface waves
D) All seismic waves travel at identical speeds and arrive at the same time
Answer: C) P-waves arrive first, followed by S-waves, then surface waves
Rationale: Primary waves (P-waves) are compressional waves and the fastest
seismic waves. Secondary waves (S-waves) are shear waves and travel slower
than P-waves. Surface waves are the slowest but cause the most severe ground
displacement.
Question 3
What occurs to the velocity of a P-wave when it transitions from traveling through
dense, solid igneous rock to loosely packed sedimentary material?
A) The velocity increases significantly
B) The velocity decreases significantly
C) The velocity remains exactly the same
D) The wave changes into an S-wave
Answer: B) The velocity decreases significantly
Rationale: Seismic waves travel faster through denser, highly consolidated, and
rigid materials like igneous rocks. Loosely packed, unconsolidated sediment
slows down seismic energy, which often leads to amplified shaking at the
surface.
, Question 4
What is the difference between an earthquake's focus (hypocenter) and its epicenter?
A) The focus is on the surface; the epicenter is deep underground
B) The focus is the point underground where the rupture starts; the epicenter is the
surface point directly above it
C) The focus measures landslide potential; the epicenter measures shaking intensity
D) The focus is only used for volcanic earthquakes; the epicenter is used for tectonic
events
Answer: B) The focus is the point underground where the rupture starts; the
epicenter is the surface point directly above it
Rationale: The focus or hypocenter is the exact subterranean origin point of fault
rupture. The epicenter is the map location projected directly onto the Earth's
surface vertically above that focus point.
Question 5
How many seismic recording stations are required at a minimum to uniquely pinpoint
the epicenter of an earthquake using triangulation?
A) One station
B) Two stations
C) Three stations
D) Four stations
Answer: C) Three stations
Rationale: A single station gives a radius of distance but no direction. Two
stations result in two intersecting circles that meet at two separate points. A
minimum of three stations is necessary because three intersecting circles will
overlap at exactly one unique location.
HAZARDS (EARTHQUAKES & LANDSLIDE STUDY
GUIDE & 400-QUESTION TEST BANK | VERIFIED
100% CORRECT ANSWERS & EXPERT
RATIONALES | LATEST 2024/2025 EDITION
,Boost your grades instantly with this
comprehensive 400-question test bank
specifically engineered for the ESS 101 B
Laboratory 8 Quiz on Earthquakes and
Landslides. Every question features a clear
multiple-choice breakdown, complete with fully
bolded and italicised answers and in-depth scientific
rationales for seamless studying. Perfect for quick
revision, this verified 2024/2025 study resource
guarantees a 100% thorough grasp of seismic
waves, mass wasting mechanics, and fault systems.
Question 1
What is the fundamental difference between stress and strain in the context of rock
deformation?
A) Stress is a change in shape; strain is an applied force
B) Stress is the force applied per unit area; strain is the resulting deformation or change
in shape
C) Stress only occurs during earthquakes; strain occurs continuously
D) Stress and strain are identical concepts measured in the same units
Answer: B) Stress is the force applied per unit area; strain is the resulting
deformation or change in shape
,Rationale: Stress represents the external tectonic pressure or force exerted on a
rock body. Strain is the physical response or deformation (bending, stretching, or
fracturing) that occurs as a direct result of that applied stress.
Question 2
Which types of seismic waves are generated during an earthquake, and in what order
do they arrive at a seismic recording station?
A) Surface waves arrive first, followed by S-waves, then P-waves
B) S-waves arrive first, followed by P-waves, then surface waves
C) P-waves arrive first, followed by S-waves, then surface waves
D) All seismic waves travel at identical speeds and arrive at the same time
Answer: C) P-waves arrive first, followed by S-waves, then surface waves
Rationale: Primary waves (P-waves) are compressional waves and the fastest
seismic waves. Secondary waves (S-waves) are shear waves and travel slower
than P-waves. Surface waves are the slowest but cause the most severe ground
displacement.
Question 3
What occurs to the velocity of a P-wave when it transitions from traveling through
dense, solid igneous rock to loosely packed sedimentary material?
A) The velocity increases significantly
B) The velocity decreases significantly
C) The velocity remains exactly the same
D) The wave changes into an S-wave
Answer: B) The velocity decreases significantly
Rationale: Seismic waves travel faster through denser, highly consolidated, and
rigid materials like igneous rocks. Loosely packed, unconsolidated sediment
slows down seismic energy, which often leads to amplified shaking at the
surface.
, Question 4
What is the difference between an earthquake's focus (hypocenter) and its epicenter?
A) The focus is on the surface; the epicenter is deep underground
B) The focus is the point underground where the rupture starts; the epicenter is the
surface point directly above it
C) The focus measures landslide potential; the epicenter measures shaking intensity
D) The focus is only used for volcanic earthquakes; the epicenter is used for tectonic
events
Answer: B) The focus is the point underground where the rupture starts; the
epicenter is the surface point directly above it
Rationale: The focus or hypocenter is the exact subterranean origin point of fault
rupture. The epicenter is the map location projected directly onto the Earth's
surface vertically above that focus point.
Question 5
How many seismic recording stations are required at a minimum to uniquely pinpoint
the epicenter of an earthquake using triangulation?
A) One station
B) Two stations
C) Three stations
D) Four stations
Answer: C) Three stations
Rationale: A single station gives a radius of distance but no direction. Two
stations result in two intersecting circles that meet at two separate points. A
minimum of three stations is necessary because three intersecting circles will
overlap at exactly one unique location.
