Third Quarter_Volcano_Melcs1-3

1. The Philippines is home to many volcanoes. The most famous among our volcanoes is the Mayon Volcano with forty-nine (49) number of historical eruptions. When was the last eruption of Mayon Volcano?

• May 7, 2013

• May 7, 2014

• June 7, 2013

• June 7, 2014

2. Volcanic eruption happen when lava and gas are discharged from a volcanic vent. Explosive volcanic eruptions can be dangerous and deadly. In the Philippines, the Mt. Pinatubo eruption was recorded as the world’s second largest volcanic eruption of the 20^th century. What are the average years of inactivity of Mt. Pinatubo before its eruption last June 15, 1991?

• 60 years

• 600 years

• 6 000 years

• 60 000 years

3. The Department of Science and Technology (DOST) is the executive department of the Philippine government responsible for coordination of science and technology-related concerns. One of its service agencies focus on the mitigation of disasters that may arise from volcanic eruptions, earthquake, tsunami and other related geotectonic phenomena. What is the DOST service agency concerned for the volcanic and earthquake activity?

• Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA)

• National Aeronautics and Space Administration (NASA)

• Department of Tourism (DOT)

• Philippine Volcanology and Seismology (PHIVOLCS)

4. Volcanoes come in different shapes and sizes and each has a unique history of eruption. How will you classify volcanoes that those have a record of eruption within the last 600 years or those that erupted 10, 000 years ago based on analyses of their materials?

• Inactive Volcanoes

• Active Volcanoes

• Super Volcanoes

• Stratovolcanoes

5. There are about three hundred (300) volcanoes in the Philippines. Twenty-four (24) of these are active volcanoes as of February 2021 while the larger percentage remains dormant as of the record. Which of the following are active volcanoes?

I. Mt. Mayon in Albay

II. Mt. Taal in Batangas

III. Mt. Apo In Davao del Sur

IV. Mt. Kanlaon in Negros Oriental

• I and II only

• I and III only

• I, II and III only

• I, II and IV only

6. Volcanoes are described according to its eruptive style. They are generally classified as wet or dry depending on the magma’s water content. How will you classify an eruption of a periodic weak to violent eruption characterized by fountain lava?

• Strombolian

• Phreatomagmatic

• Plinian

• Vulcanian

7. A violent eruption due to the contact between water and magma. As a result, a large column of very fine ash and high-speed and sideway emission of pyroclastic called base surges are observed is called ______________.

• Strombolian

• Phreatomagmatic

• Plinian

• Vulcanian

8. An excessively explosive type of eruption of gas and pyroclastic, just like our Pinatubo Volcano in Zambales is called ______________.

• Strombolian

• Phreatomagmatic

• Plinian

• Vulcanian

9. A type of eruptive style characterized by tall eruption columns that reach up to 20 km high with pyroclastic flow and ashfall tephra.

• Strombolian

• Phreatomagmatic

• Plinian

• Vulcanian

10. Volcanoes are classified according to record of eruption. How can you classify volcanoes that have not erupted for the last 10, 000 years and their physical form is being changed by agents of weathering and erosion through formation of deep and long gullies?

• Inactive Volcanoes

• Active Volcanoes

• Super Volcanoes

• Stratovolcanoes