GEOL 1340 Exam 3 Questions &
Answers (Grade A+)
Which of the following statements regarding heat flow on Earth is
TRUE? -
correct answer ✅Heat flow, as measured on Earth's surface, is
higher along mid-ocean ridges and other volcanically active regions
but lower within the interiors of stable continents.
For the figure below, which letter corresponds to the epicenter of
the earthquake? -
correct answer ✅Site B
The figure below illustrates the motion of ____________ -
correct answer ✅P-waves
,GEOL 1340 Exam 3 Questions &
Answers (Grade A+)
The bending of seismic waves when passing through Earth's interior
is called _________ -
correct answer ✅Refraction
The bending of seismic waves when passing through Earth's interior
is due to changes in wave ____________ when encountering
different Earth materials. -
correct answer ✅Velocity
The Moho is the boundary between the ________ and _________ -
correct answer ✅Crust/upper mantle
What happens to S-waves as they pass through the asthenosphere?
-
correct answer ✅S-waves slow down because of the presence of a
few percent partial melt
What happens to P- and S-waves when encountering transition
zones at 400 km and 700 km depths? -
correct answer ✅They speed up due to density increases in mantle
rock resulting from phase changes in minerals.
, GEOL 1340 Exam 3 Questions &
Answers (Grade A+)
What changes in P- and S-waves occur when encountering the
outer core that lead scientists to conclude that this layer is
composed of liquid iron? -
correct answer ✅S-waves cannot pass through the outer core
while P-waves slow down significantly when passing through this
layer.
The upper mantle is composed largely of a rock called ___________
-
correct answer ✅Peridotite
P-wave shadow zones are regions on Earth's surface where... -
correct answer ✅No P-waves are detected by seismometers.
Circulation of liquid iron in the outer core is thought to be
responsible for Earth's _____________ -
correct answer ✅Magnetic field
Earth's overall density is calculated to be 5.52 grams per cubic
centimeter. However, crustal rocks only give densities around 2.9
grams per cubic centimenter. Where is the excess density? -
correct answer ✅Iron in Earth's core
Answers (Grade A+)
Which of the following statements regarding heat flow on Earth is
TRUE? -
correct answer ✅Heat flow, as measured on Earth's surface, is
higher along mid-ocean ridges and other volcanically active regions
but lower within the interiors of stable continents.
For the figure below, which letter corresponds to the epicenter of
the earthquake? -
correct answer ✅Site B
The figure below illustrates the motion of ____________ -
correct answer ✅P-waves
,GEOL 1340 Exam 3 Questions &
Answers (Grade A+)
The bending of seismic waves when passing through Earth's interior
is called _________ -
correct answer ✅Refraction
The bending of seismic waves when passing through Earth's interior
is due to changes in wave ____________ when encountering
different Earth materials. -
correct answer ✅Velocity
The Moho is the boundary between the ________ and _________ -
correct answer ✅Crust/upper mantle
What happens to S-waves as they pass through the asthenosphere?
-
correct answer ✅S-waves slow down because of the presence of a
few percent partial melt
What happens to P- and S-waves when encountering transition
zones at 400 km and 700 km depths? -
correct answer ✅They speed up due to density increases in mantle
rock resulting from phase changes in minerals.
, GEOL 1340 Exam 3 Questions &
Answers (Grade A+)
What changes in P- and S-waves occur when encountering the
outer core that lead scientists to conclude that this layer is
composed of liquid iron? -
correct answer ✅S-waves cannot pass through the outer core
while P-waves slow down significantly when passing through this
layer.
The upper mantle is composed largely of a rock called ___________
-
correct answer ✅Peridotite
P-wave shadow zones are regions on Earth's surface where... -
correct answer ✅No P-waves are detected by seismometers.
Circulation of liquid iron in the outer core is thought to be
responsible for Earth's _____________ -
correct answer ✅Magnetic field
Earth's overall density is calculated to be 5.52 grams per cubic
centimeter. However, crustal rocks only give densities around 2.9
grams per cubic centimenter. Where is the excess density? -
correct answer ✅Iron in Earth's core
