Volcanoes and Eruptions Quiz

Which of the following characteristics of a volcano depends on its magma emission?

• age

• location

• shape

• size

What factor is associated with huge volcanic eruptions that may cause decrease in the Earth’s average temperature for a few years?

• acid rain

• heat

• light

• volcanic ash

What type of eruption is due to contact between water and magma?

• Plinian Phreatic

• Phreatic

• Phreatomagmatic

• Strombolian

What determines the nature of eruption?

• magma’s temperature

• chemical composition

• amount of dissolved gas it contains

• both A and C

Which of the following volcanoes has 47 craters?

• Kanlaon Mayon

• Mayon

• Pinatubo

• Taal

Which of the following statement describes the strombolian?

• Stream-driven eruption

• Excessively explosive type of eruption of gas and pyroclastic

• Periodic weak to violent eruption characterized by fountain lava.

• Characterized by tall eruption column that reach up to 20 km high with pyroclastic flow and ashfall tephra

What shape of volcano was formed from the accumulation of lava that oozes out form the volcano?

• Cinder cone

• Composite cone

• Shield cone

• Stratovolcano

Which characteristic of magma mainly determines its explosiveness?

• amount

• color

• silica content

• temperature

How does the viscosity of magma affect the nature of volcanic eruption?

• The gas dissolved in magma tends to increase its ability to flow

• The higher the temperature of magma is, the lower its viscosity.

• The loss of gases makes magma more viscous, forming a dome or columnar

• Magma with high silica content are more viscous than those with low silica content

Which of the following volcanoes are classified as active volcanoes?

• I. Mayon in Albay III. Vulcan in Camiguin

• I and II only

• II and III only

• I, II, and III only

• II.Taal in Batangas IV. Kanlaon in Negros Oriental