The quiz consists of a) 15 short answer and b) one written question. The quiz topics for the 15 short answer questions are listed below. Of these 15 questions, in general, the first seven questions are from the lecture notes, questions 8-11 are from the first readings discussion of this quiz period, and questions 12-15 are from the second readings discussion. The questions from the lecture notes will have one or two of the math problems covered in lecture.
The potential written questions are listed below.
Eight quiz questions will come from the readings discussion questions: four from the first readings discussion and four from the second readings discussion.
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Bowen's Reaction Series
Seven quiz questions will come from the lecture notes, including at least one math problem.
Give the two forms that magma take during an eruption.
List the two factors that determine the explosivity of an eruption.
Explain how variations in the gas content and viscosity of magmas affects the
explosivity of an eruption.
List the two factors that determine the viscosity of a magma.
Explain how variations in the silica concentration affect viscosity of magmas.
Explain how variations in temperature affect the viscosity of magmas.
Explain why felsic magmas are more viscous than mafic magmas.
Use the Igneous
Rock Classification
Chart to determine
Explain why felsic volcanoes tend to explode more commonly than mafic volcanoes.
Where do most felsic volcanoes form?
Give an example of a felsic volcano.
Describe a lava dome.
Which type of lava tends to form a lava dome?
Why do lava domes form?
Contrast the temperatures of felsic and mafic magmas.
Explain why mafic magmas are less viscous than felsic magmas.
Explain why mafic volcanoes tend to be less explosive than felsic volcanoes.
List the three classes of lava.
List the three types of lava in Hawai'i.
List the two types of pahoehoe.
Explain why ropy pahoehoe forms.
Give the relative temperatures of pahoehoe and 'a'a.
Give the relative viscosities of pahoehoe and 'a'a.
Contrast the relative thicknesses
of pahoehoe and 'a'a flows.
Describe the formation of lava toes.
Describe an 'a'a flow.
Explain the formation of clinker.
Explain why clinker forms on the top and bottom of an 'a'a flow.
Give the relative speed of pahoehoe and 'a'a flows.
Explain the formation of an accretionary lava ball.
Do accretionary lava balls form in pahoehoe or 'a'a?
Give the chemical
difference between 'a'a and pahoehoe.
Do most lava flows in Hawai'i begin as pahoehoe or 'a'a?
Which type of lava is more common closer
to the vent where it erupted?
Can a pahoehoe flow change into an 'a'a flow?
Can an 'a'a flow change into a pahoehoe flow?
Which factors determine if a flow is pahoehoe or 'a'a?
List the factors that cause the viscosity of a lava flow to increase.
Give the relative rate of shear for a lava flow, if its viscosity is high.
Explain how a viscous pahoehoe flow might convert to an 'a'a flow.
Give the relative rate of shear for a lava flow, if its viscosity is low.
Explain how a low viscosity pahoehoe flow might convert to an 'a'a flow.
Do lava tubes form more commonly
in 'a'a flows or pahoehoe flows?
Explain the formation of lava tubes.
Explain the formation of pillow lavas.
List the primary types of volcanoes.
How are shield volcanoes constructed?
Describe the shape of shield volcanoes.
Explain why shield volcanoes are relatively wide compared to their heights.
Do shield volcanoes form from mafic or felsic magmas?
Explain the role of lava tubes in the development of the widths of shield volcanoes.
Give an example of a shield volcano.
How are pyroclastic volcanoes formed?
Describe the shape of a pyroclastic volcano.
Explain why pyroclastic volcanoes are tall compared to their widths.
Give an example of a pyroclastic volcano.
How are stratovolcanoes formed?
Do stratovolcanoes form from mafic or felsic magmas?
Describe the shape of a stratovolcanoes.
Explain why stratovolcanoes are tall compared to their widths.
Give an example of a stratovolcanoes.
The math problems for the quiz are on the Examples of Math Problems page. One or two questions will be a math problem.
The written question will come from lecture topics
Discuss the explosivity of an eruption.
Use the Igneous
Rock Classification
Chart to compare felsic, intermediate,
and mafic magmas.
Discuss pahoehoe and 'a'a.
Explain why a magma forms a pahoehoe or 'a'a flow.
Discuss the formation of lava tubes and pillow lavas.
Discuss volcanoes
The list of exam topics and potential written questions for the third quiz are complete