Problem 7
Why is Hawaii made of volcanoes? A) Plates are moving apart. B) A hot spot exists. C) Plates are moving together. D) Rift zones exist.
Problem 8
What kind of magmas produce violent volcanic eruptions? A) those rich in silica B) those that are fluid C) those forming shield volcanoes D) those rich in iron
Problem 8
Which of the following is the finest type of tephra? A. volcanic ash B. volcanic bombs C. volcanic cinders D. volcanic blocks
Problem 9
What is a hot spot? Why do volcanoes often form at hot spots?
Problem 9
Magma that is low in silica generally produces what kind of eruptions? A) thick C) quiet B) caldera D) explosive
Problem 10
Which type of volcano, shown above, is made entirely of tephra? A) shield C) cinder cone B) caldera D) composite
Problem 11
What kind of volcano is Kilauea? A) shield C) cinder cone B) composite D) caldera cone
Problem 12
$$ \begin{aligned} &\text { Use the table below to answer questions 12-14. }\\\ &\begin{array}{|c|c|} \hline \text { Eruption } & \begin{array}{c} \text { Volume Percent } \\ \text { Water Vapor } \end{array} \\ \hline 1 & 58.7 \\ \hline 2 & 60.1 \\ \hline 3 & 61.4 \\ \hline 4 & 59.3 \\ \hline 5 & 59.6 \\ \hline \end{array} \end{aligned} $$ Calculate the mean, median, and range of the water vapor data in the table? Describe how this information would be helpful to a volcanologist.
Problem 12
What is the largest intrusive igneous rock body? A) dike C) sill B) volcanic neck D) batholith
Problem 13
What is the process that formed Soufrière Hills volcano on Montserrat? A) plates sticking and slipping B) caldera formation C) plates sliding sideways D) plates moving together
