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?

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

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.

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

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

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

comes out?

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

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

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?