Volcano

Which of the following best describe an active volcano?

• An active volcano has a record of eruption within the last 600 years or has erupted 10,000 years ago based on analyses of its materials

• An active volcano has no record of eruption but has the potential to erupt.

• An active volcano has erupted 20,000 years ago and has evidences of volcanic activities

What are the classifications of volcanoes as adapted by the Philippine Institute of Volcanology and Seismology(PHIVOLS)

• Dormant and inactive

• Active and inactive

• Dormant and active

In terms of the shapes of volcanic cones, which of the following is not a type of volcano

• Crater cone

• Cinder cone

• Shield

Which type of volcano has a nearly perfect sloped structure which formed from alternate solidification of both lava and pyroclasti lc deposits?

• Composite cone

• Cinder cone

• Shield cone

Which type of volcano is formed from ejected lava fragments? It has a wide crater, steep slope, and most abundant of the three major types

• Composite cone

• Cinder cone

• Shield

What type of eruption is illustrated? It happened in taal volcano at Batangas in January 2020.

• Plinian

• Strombolian

• Phreatomagmatic

Which of the following types of eruption is characterised by tall eruption column that reach up to 20 km high with pyroclastic flow and ashfall tephra?

• Strombolian

• Plinian

• Vulcanian

What is the most active volcano in the Philippines with 52 records of eruption?

• Pinatubo

• Taal

• Mayon

What type of eruption is characterised by ash columns due to contact of hot rocks and water similar to what happened to kanlaon volcano in 2017?

• Plinian

• Vulcanian

• Phreatic

What type of eruption is illustrated?

• Strombolian

• Phreatic

• Phreatomagmatic