©BRAINBARTER EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
ERTH 111- Exam 2 Questions With Correct
Answers
A volcano is a constructional edifice formed from __________ and ____________. -
answer✔Lava, tephra
The melting temperature of magmas is primarily controlled by _________________________. -
answer✔Composition
The viscosity of magmas is primarily controlled by _________________________. - answer✔All
of the above: Degree of polymerization, Temperature, Volatile content
The ease of degassing in magmas dictates the ____________. - answer✔Explosive potential
The type of volcano produced is primarily a factor of the _______________. - answer✔Type of
volcanic activity
Erupting magmas with a high amount of silica but low gas contents will produce ____________.
- answer✔Steep-sided domes
1|Page
, ©BRAINBARTER EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
Erupting basaltic magmas with low gas contents will produce _____________, while basaltic
magmas with high gas contents will produce ________________. - answer✔Lava flows, fire
fountaining
Phreatic eruptions occur as an external source of _____________ interacts with magma. -
answer✔Water
The eruption of many thin, runny lava flows will produce a ________________ volcano . -
answer✔Shield
A volcano type composed of a mixture of lava and tephra is a ________________ volcano. -
answer✔Strato or composite
A volcano type composed of all tephra is a ________________ volcano. - answer✔Cinder cone
The eruption of thick, sticky lava flows with low gas will produce a ______________ volcano . -
answer✔Dome
If magma is withdrawn from a subsurface chamber it can produce a___________________. -
answer✔Caldera
A volcano that erupts only once is ________________ while a volcano that erupts multiple
times is _______________. - answer✔Monogenetic, polygenetic
A shield volcano is ________________ while a cinder cone is __________________. -
answer✔Polygenetic, monogenetic
2|Page
ALL RIGHTS RESERVED.
ERTH 111- Exam 2 Questions With Correct
Answers
A volcano is a constructional edifice formed from __________ and ____________. -
answer✔Lava, tephra
The melting temperature of magmas is primarily controlled by _________________________. -
answer✔Composition
The viscosity of magmas is primarily controlled by _________________________. - answer✔All
of the above: Degree of polymerization, Temperature, Volatile content
The ease of degassing in magmas dictates the ____________. - answer✔Explosive potential
The type of volcano produced is primarily a factor of the _______________. - answer✔Type of
volcanic activity
Erupting magmas with a high amount of silica but low gas contents will produce ____________.
- answer✔Steep-sided domes
1|Page
, ©BRAINBARTER EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
Erupting basaltic magmas with low gas contents will produce _____________, while basaltic
magmas with high gas contents will produce ________________. - answer✔Lava flows, fire
fountaining
Phreatic eruptions occur as an external source of _____________ interacts with magma. -
answer✔Water
The eruption of many thin, runny lava flows will produce a ________________ volcano . -
answer✔Shield
A volcano type composed of a mixture of lava and tephra is a ________________ volcano. -
answer✔Strato or composite
A volcano type composed of all tephra is a ________________ volcano. - answer✔Cinder cone
The eruption of thick, sticky lava flows with low gas will produce a ______________ volcano . -
answer✔Dome
If magma is withdrawn from a subsurface chamber it can produce a___________________. -
answer✔Caldera
A volcano that erupts only once is ________________ while a volcano that erupts multiple
times is _______________. - answer✔Monogenetic, polygenetic
A shield volcano is ________________ while a cinder cone is __________________. -
answer✔Polygenetic, monogenetic
2|Page
