Chapter 5 Volcanoes And Volcanic Hazards

Using the choices below, select the statement that best explains how dissolved gases drive volcanic eruptions.

Define magma

________ is a material's resistance to flowing.

Which of the following lavas make up 90% of the total volume of lava on Earth?

________ is pulverized rock, lava fragments, and ash erupted from a volcano.

What is the name of the small holes created by gas bubbles on the surface of scoria?

Around which volcano would a scientist likely find pillow basalts?

Which type of magma(s) will produce scoria?

A ________ is a cone-shaped structure created by successive eruptions of volcanic materials such as lava or pyroclastic materials.

Which of the following choices best explains the difference between a crater and a caldera?

With the exception of volcanoes associated with a subduction zone, most volcanic islands are ________ volcanoes.

) In order to cover such large expanses of seafloor, shield volcanoes erupt ________ lava.

A ________ is a submarine volcano.

Which volcanoes have flanks with the steepest angle of repose (between 30° and 40°)?

Based on the structure of the cone and the rock making it up, what interpretations can be made about the gas content of eruptions from cinder cone volcanoes compared to those of shield volcanoes?

What is the driving force behind pyroclastic flows?

What kind of volcano is most closely associated with pyroclastic flows?

Which of the following is not a method of caldera formation?

An example of a volcanic caldera that formed from the collapse of a magma chamber after large volumes of material were erupted is ________.

Along which tectonic boundary will chains of composite cone volcanoes be located?

How is magma generated along convergent plate boundaries?

(T/F)The more silica in magma, the lower the viscosity.

(T/F)Pyroclastic materials are generally associated with viscous magmas

(T/F)Scoria has so many vesicles it will float on water.

(T/F) Shield volcanoes will have no pyroclastic materials associated with their eruptions.

(T/F)Most cinder cones have eruptive phases that last for centuries.

(T/F)Ash can sometimes be associated with eruptions from cinder cone volcanoes

(T/F)Composite cones are also known as stratovolcanoes.

(T/F)Secondary vents on composite cones can generate cinder cones.

(T/F)Lava domes can only collapse during eruptions.