Volcanoes are cone-shaped landforms with an opening at the top or sides that allow hot, thick clouds of gas, molten rock, and ash to escape. According to PHIVOLCS, volcanoes are classified as either active if they have erupted within the last 600 years or 10,000 years ago based on analysis, or inactive if they have not erupted in over 10,000 years and are being eroded through weathering.

1. What is a volcano

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4. 

5. Volcano
Cone-shaped
It has opening at the top (or in
some case, on the sides)
Hot thick cloud of gas, molten
rocks, ash forming a cauliflower
shaped cloud comes out of its
opening.

6. Classification of
volcanoes

According to PHIVOLCS volcanoes are classified into
1. Active volcanoes – are those that have a record of
eruption within the last 600 years or those that
erupted 10,000 years ago based on analysis of the
materials.
2. Inactive volcanoes-are those 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.