2025 Geology 101 Exams With 200, Questions And
Correct Answers Respectively/ Geol 101 Exams Latest
2025/ Geology 101 Final Exam 2025 Test Bank (Brand
New!)>>COVERS MOST TEST QUESTIONS
Magmas have a variety of chemical compositions because of all of the following EXCEPT
Choose one:
A. magmas can never mix with other existing magma.
B. they come from a variety of source rocks.
C. the magmas' heat can melt varied rock from the walls of the magma chamber.
D. the rocks that melt to make magma are composed of many minerals, not all of which melt under the
same conditions. - ANSWER****A. magmas can never mix with other existing magma.
Identify the FALSE statement. Hot solid rock in the Earth
Choose one:
A. may melt if heat is transferred to it from hot mantle rock rising up into the crust.
B. maintains uniform composition as it melts and becomes magma.
C. may melt if volatiles such as water and carbon dioxide are added.
D. may be even hotter than surface lava because of the pressure of overlying rock. - ANSWER****B.
maintains uniform composition as it melts and becomes magma.
Which of the following statements is FALSE? Felsic (or silicic) magm
Choose one:
A. crystallizes at the lowest temperatures.
B. is less viscous than mafic magma.
C. has about 70% silica and little magnesium and iron.
D. is likely to form light tan, pink, or maroon rocks. - ANSWER****B. is less viscous than mafic magma.
Identify the FALSE statement. Magma moves upward toward the Earth's surface
,Choose one:
A. slowly, working its way up through cracks and narrow conduits.
B. more quickly as it cools and therefore becomes less viscous.
C. because the weight of overlying rock creates pressure that squeezes it up.
D. because it is less dense than the surrounding rock. - ANSWER****B. more quickly as it cools and
therefore becomes less viscous.
Bowen's reaction series
Choose one:
A. shows that minerals crystallize in a random order, with no particular pattern involved.
B. is an attempt to explain the logic of formation of sedimentary rocks.
C. allows a geologist to predict what minerals will be found in a given igneous rock.
D. explains why some compounds use ionic bonds and others have covalent bonding. - ANSWER****C.
allows a geologist to predict what minerals will be found in a given igneous rock.
Which of the following is NOT an intrusive igneous structure?
Choose one:
A. pillow lava
B. batholith
C. dike
D. sill - ANSWER****A. pillow lava
Which of the following is NOT considered a warning sign of imminent eruption?
Choose one:
A. earthquake activity
B. change in heat flow from the volcano's surface
C. a period of quiescence in the volcano's activity
D. increase in gas emissions and hydrothermal activities - ANSWER****C. a period of quiescence in the
volcano's activity
,How is a lahar different from a pyroclastic flow?
Choose one:
A. A pyroclastic flow is a mixture of debris and air, whereas a lahar is a fast, liquid flow.
B. A lahar is a mixture of debris and air, whereas a pyroclastic flow is a liquid mixture of lahar debris.
C. A pyroclastic flow occurs mainly at a volcano that is covered with snow and ice.
D. A pyroclastic flow is always basaltic, whereas a lahar is always silicic. - ANSWER****A. A pyroclastic
flow is a mixture of debris and air, whereas a lahar is a fast, liquid flow.
An explosive volcanic eruption does not produce lava flows because
Choose one:
A. the sudden release of accumulated gas pressure blasts the lava upward, forming pyroclastic debris.
B. the lava produced cools too quickly due to the abundant water in the surrounding environment.
C. the gases below the surface rise and cause the magma to cool and solidify.
D. the overriding plate at the subduction zone where the volcano formed is composed of oceanic
lithosphere. - ANSWER****A. the sudden release of accumulated gas pressure blasts the lava upward,
forming pyroclastic debris.
The image shows Capulin Volcano, a volcano that formed roughly 60,000 years ago and rises 1,000 feet
above the surrounding plain. Capulin is best described as what type of volcano?
Choose one:
A. cinder cone
B. composite volcano
C. shield volcano - ANSWER****A. cinder cone
Different types of lava have different viscosities, depending on their composition or temperature, or
both. Label the types of lava flows based on their relative viscosities.
A. highest-viscosity lava
B. intermediate-viscosity lava
C. lowest-viscosity lava - ANSWER****Top to Bottom:
A. highest-viscosity lava
, B. intermediate-viscosity lava
C. lowest-viscosity lava
Label the components of an explosive eruption. - ANSWER****Top to Bottom:
Top right: F. Dispersed Ash
Second Down: A. Convective Cloud
Third down on the right: D. Falling lapilli and ash
Fourth down: B. Eruption Jet
Fifth down: E. Pyroclastic Ash
Which of the following are methods used by geologists to predict a volcanic eruption?
Choose one or more:
A. measuring an increase in heat flow
B. measuring an increased occurrence of gaseous emissions
C. measuring a decrease in gas and steam emissions
D. observing changes in the shape of a volcano
E. measuring an increased incidence of earthquakes - ANSWER****A. measuring an increase in heat
flow
B. measuring an increased occurrence of gaseous emissions
D. observing changes in the shape of a volcano
E. measuring an increased incidence of earthquakes
Label the illustration showing the components of a volcano and the region under the volcano by
dragging the labels to the correct targets. You will use four of the five labels. - ANSWER****Left side top
down:
C. Flank Vent
E. Magma Chamber
Right side top down:
Correct Answers Respectively/ Geol 101 Exams Latest
2025/ Geology 101 Final Exam 2025 Test Bank (Brand
New!)>>COVERS MOST TEST QUESTIONS
Magmas have a variety of chemical compositions because of all of the following EXCEPT
Choose one:
A. magmas can never mix with other existing magma.
B. they come from a variety of source rocks.
C. the magmas' heat can melt varied rock from the walls of the magma chamber.
D. the rocks that melt to make magma are composed of many minerals, not all of which melt under the
same conditions. - ANSWER****A. magmas can never mix with other existing magma.
Identify the FALSE statement. Hot solid rock in the Earth
Choose one:
A. may melt if heat is transferred to it from hot mantle rock rising up into the crust.
B. maintains uniform composition as it melts and becomes magma.
C. may melt if volatiles such as water and carbon dioxide are added.
D. may be even hotter than surface lava because of the pressure of overlying rock. - ANSWER****B.
maintains uniform composition as it melts and becomes magma.
Which of the following statements is FALSE? Felsic (or silicic) magm
Choose one:
A. crystallizes at the lowest temperatures.
B. is less viscous than mafic magma.
C. has about 70% silica and little magnesium and iron.
D. is likely to form light tan, pink, or maroon rocks. - ANSWER****B. is less viscous than mafic magma.
Identify the FALSE statement. Magma moves upward toward the Earth's surface
,Choose one:
A. slowly, working its way up through cracks and narrow conduits.
B. more quickly as it cools and therefore becomes less viscous.
C. because the weight of overlying rock creates pressure that squeezes it up.
D. because it is less dense than the surrounding rock. - ANSWER****B. more quickly as it cools and
therefore becomes less viscous.
Bowen's reaction series
Choose one:
A. shows that minerals crystallize in a random order, with no particular pattern involved.
B. is an attempt to explain the logic of formation of sedimentary rocks.
C. allows a geologist to predict what minerals will be found in a given igneous rock.
D. explains why some compounds use ionic bonds and others have covalent bonding. - ANSWER****C.
allows a geologist to predict what minerals will be found in a given igneous rock.
Which of the following is NOT an intrusive igneous structure?
Choose one:
A. pillow lava
B. batholith
C. dike
D. sill - ANSWER****A. pillow lava
Which of the following is NOT considered a warning sign of imminent eruption?
Choose one:
A. earthquake activity
B. change in heat flow from the volcano's surface
C. a period of quiescence in the volcano's activity
D. increase in gas emissions and hydrothermal activities - ANSWER****C. a period of quiescence in the
volcano's activity
,How is a lahar different from a pyroclastic flow?
Choose one:
A. A pyroclastic flow is a mixture of debris and air, whereas a lahar is a fast, liquid flow.
B. A lahar is a mixture of debris and air, whereas a pyroclastic flow is a liquid mixture of lahar debris.
C. A pyroclastic flow occurs mainly at a volcano that is covered with snow and ice.
D. A pyroclastic flow is always basaltic, whereas a lahar is always silicic. - ANSWER****A. A pyroclastic
flow is a mixture of debris and air, whereas a lahar is a fast, liquid flow.
An explosive volcanic eruption does not produce lava flows because
Choose one:
A. the sudden release of accumulated gas pressure blasts the lava upward, forming pyroclastic debris.
B. the lava produced cools too quickly due to the abundant water in the surrounding environment.
C. the gases below the surface rise and cause the magma to cool and solidify.
D. the overriding plate at the subduction zone where the volcano formed is composed of oceanic
lithosphere. - ANSWER****A. the sudden release of accumulated gas pressure blasts the lava upward,
forming pyroclastic debris.
The image shows Capulin Volcano, a volcano that formed roughly 60,000 years ago and rises 1,000 feet
above the surrounding plain. Capulin is best described as what type of volcano?
Choose one:
A. cinder cone
B. composite volcano
C. shield volcano - ANSWER****A. cinder cone
Different types of lava have different viscosities, depending on their composition or temperature, or
both. Label the types of lava flows based on their relative viscosities.
A. highest-viscosity lava
B. intermediate-viscosity lava
C. lowest-viscosity lava - ANSWER****Top to Bottom:
A. highest-viscosity lava
, B. intermediate-viscosity lava
C. lowest-viscosity lava
Label the components of an explosive eruption. - ANSWER****Top to Bottom:
Top right: F. Dispersed Ash
Second Down: A. Convective Cloud
Third down on the right: D. Falling lapilli and ash
Fourth down: B. Eruption Jet
Fifth down: E. Pyroclastic Ash
Which of the following are methods used by geologists to predict a volcanic eruption?
Choose one or more:
A. measuring an increase in heat flow
B. measuring an increased occurrence of gaseous emissions
C. measuring a decrease in gas and steam emissions
D. observing changes in the shape of a volcano
E. measuring an increased incidence of earthquakes - ANSWER****A. measuring an increase in heat
flow
B. measuring an increased occurrence of gaseous emissions
D. observing changes in the shape of a volcano
E. measuring an increased incidence of earthquakes
Label the illustration showing the components of a volcano and the region under the volcano by
dragging the labels to the correct targets. You will use four of the five labels. - ANSWER****Left side top
down:
C. Flank Vent
E. Magma Chamber
Right side top down:
