Types of Volcanoes

What is the role of gas in volcanic eruptions?

• Gas can increase pressure within the volcano, leading to explosive eruptions.

• Gas has no effect on volcanic eruptions.

• Gas cools the magma, preventing eruptions.

• Gas helps in the formation of new landforms after an eruption.

What type of volcano is formed primarily from volcanic ash and cinders?

• Shield volcano

• Composite volcano

• Cinder Cone volcano

• Lava dome

What type of volcano is wide and flat, created by layers of lava flow?

• Cinder cone volcano

• Stratovolcano

• Shield volcano

• Lava dome

What factors influence the type of volcanic eruption?

• The viscosity of the lava and the gas content.

• The temperature of the surrounding air.

• The color of the lava.

• The height of the volcano.

What type of eruption is likely with high viscosity lava?

• Explosive eruption.

• Effusive eruption.

• Phreatic eruption.

• Hawaiian eruption.

What is a shield volcano?

• A volcano that is wide and flat, formed by the flow of low-viscosity lava.

• A steep, conical volcano formed by explosive eruptions.

• A volcano that erupts only once and then becomes inactive.

• A volcano that is characterized by a dome shape and thick lava flows.

What type of volcano is Mount St. Helens?

• Shield volcano, primarily built up by lava flows.

• Cinder cone volcano, formed from volcanic ash and small fragments.

• Composite volcano, composed of layers of lava and cinders.

• Lava dome, created by the slow extrusion of viscous lava.

What is a composite volcano?

• A volcano that erupts only lava flows.

• A volcano made up of alternating layers of lava flows, ash, and cinders.

• A volcano that is primarily formed from explosive eruptions of gas.

• A volcano that is formed from a single type of material.

What are the characteristics of lava with low viscosity?

• Thick and Sticky

• Runny, Smooth, Flows Easily

• Bubbling and Gassy

• Cold and Solid

What is the main hazard associated with explosive eruptions?

• They can produce ash clouds, pyroclastic flows, and lava bombs.

• They primarily cause minor earthquakes.

• They lead to the formation of new volcanic islands.

• They result in heavy rainfall and flooding.