Quiz on Vulcanicity

What is vulcanicity?

• The process of weathering of minerals

• The process of sediment deposition

• The process of erosion of rocks

• The process of eruption of magma

Which type of vulcanicity occurs when material breaks through the earth's surface?

• Extrusive vulcanicity

• Intrusive vulcanicity

• Sedimentary vulcanicity

• Metamorphic vulcanicity

What is magma referred to once it is ejected onto the surface?

• Gas

• Ash

• Lava

• Rock

Which of the following is an example of an active volcano?

• Mt. Kenya

• Mt. Elgon

• Mt. Cameroon

• Mts. Kenya

What type of volcano is characterized by a broad, gently sloping dome?

• Cinder cone

• Composite cone

• Shield volcano

• Plug dome

What type of volcanic feature is formed by the solidification of lava within a vent?

• Caldera

• Ash cone

• Crater

• Volcanic plug

What is the main difference between a crater and a caldera?

• A crater is larger than a caldera

• A caldera is formed by the collapse of a volcano

• A crater is formed by lava flow

• A caldera is always filled with water

Which of the following volcanoes is an example of a composite cone?

• Mt. Kilimanjaro

• Mt. Mauna Loa

• Mt. Marsabit

• Mt. Longonot

How do ash and cinder cones form?

• From the solidification of lava

• From the collapse of a caldera

• From the accumulation of ash and pyroclastic materials

• From the eruption of basic lava

What is the significance of the viscosity of lava in determining the shape of a volcano?

• Viscous lava creates steep-sided cones

• Viscous lava only forms underwater volcanoes

• Viscous lava creates wide, gentle slopes

• Viscous lava has no effect on volcano shape