VOLCANOES

Which of these is CORRECTLY matched?

• 1: Magma Flow

• 2: Magma Flow

• 3: Slope

• 4: Lava

Which type of volcanoes have broad bases and steep slopes and are formed by

alternating layers of lava flows, volcanic ash, cinders, blocks and pyroclastic

materials?

• Cinder Cone Volcanoes

• Composite Volcanoes

• Lava Domes

• Shield Volcanoes

Based on behavioral and historical record of PHILVOCS, How many active volcanoes in the Philippines?

• 24

• 25

• 34

• 35

It is a Philippine national institution dedicated to provide information on the activities of volcanoes, earthquakes, and tsunamis, as well as other specialized information and services primarily for the protection of life and property and in support of economic, productivity, and sustainable development.

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

• Philippine Institute of Volcanology and Seismology (PHILVOCS)

• Advanced Science and Technology Institution (ASTI)

• Philippine Council for Industry, Energy and Emerging Technology Research and Development (PCIEERD)

Taal Volcano is one of the most active volcanoes in the Philippines. What classification of volcanoes it belongs?

• cinder cones

• composite volcanoes

• lava domes

• shield volcanoes

What type of volcanic eruption is short lived, characterized by ash columns but may be a beginning of a larger eruption.

• Phreatomagmatic

• Plinian

• Vulcanian

• Phreatic

What is the term used to represent the opening of the volcano where magma

comes out?

• Chamber

• Summit

• Crater

• Vent

Whick of the folowing is not a sign of an impending volcanic eruption?

• Ground Swells

• Crater glow

• Shaking ground

• Development of new thermal areas

Which are considered active volcanoes in the Philippines?

I. Mayon Albay

II. Calayan in Cagayan

III. Kanlaon in Negros Island

IV. Hibok-hibok in Camiguin

• I and II only

• I, II, and III only

• I, II, and IV only

• I, III, and IV only

The eruption of Mount Pinatubo in the Philippines on June 15, 1991, was the

second largest of the 20th century. Its eruption was characterized as an

excessively explosive type of eruption of gas and pyroclastic. Which type of the

eruption is this?

• Phreatic

• Phreatomagmatic

• Plinian

• Strombolian