Volcanic Eruption

What defines an active volcano?

• A) A volcano that has not erupted for at least 100 years

• B) A volcano that has erupted within historical times or is currently showing signs of unrest

• C) A volcano that is completely dormant and unlikely to erupt again

• D) A volcano that has never erupted before

Which of the following best describes an inactive volcano?

• A) A volcano that has recently erupted and is currently dormant

• B) A volcano that has no historical record of eruption

• C) A volcano that is currently showing signs of unrest

• D) A volcano that has erupted within the last 100 years

In which region of the Philippines are most active volcanoes located?

• A) Luzon

• B) Visayas
  

• C) Mindanao

• D) Palawan

What is the characteristic feature of an active volcano?

• A) No signs of activity

• B) Regular and predictable eruptions

• C) Absence of magma chamber

• D) Constantly emitting lava flows and gases

Which of the following is not a type of volcanic eruption?

• A) Plinian

• B) Strombolian

• C) Inactive

• D) Vulcanian

Which type of volcanic eruption is characterized by violent explosions and high ash plumes?

• A) Strombolian

• B) Hawaiian

• C) Plinian

• D) Vulcanian

What distinguishes a Strombolian eruption from other types?

• A) Slow and effusive lava flows

• B) Moderate explosions with lava fountains

• C) Highly explosive with pyroclastic flows

• D) Continuous lava flows without any explosions
  

What type of eruption is associated with a lava dome forming?

• A) Plinian

• B) Vulcanian

• C) Surtseyan

• D) Phreatic

Which type of volcanic eruption is characterized by sudden explosions due to groundwater interaction with magma?

• A) Phreatic

• B) Hawaiian

• C) Strombolian
  

• D) Surtseyan

What is a Surtseyan eruption primarily associated with?

• A) Submarine volcanoes

• B) Shield volcanoes

• C) Stratovolcanoes

• D) Caldera volcanoes