Flashcards in Volcanic Eruption Deck (18):
The world's smallest active volcano:
- described as “crater within an island within a lake” because it stands as an island at Taal Lake.
- There have been 33 recorded eruptions of Taal since 1572.
An active stratovolcano in the province of Albay:
- Famous for its almost perfect conical shape
- most active volcano in the country, having erupted over 47 times in the past 400 years.
Highest mountain in the country:
- large stratovolcano on the island of Mindanao, Philippines
- its name means “master” or “grandfather”
ADVANTAGES OF VOLCANOES
- Serve as a foreign and local tourist attraction
- Help improve the quality of the surrounding soil by providing nutrients for crops.
- Their geothermal component is also an excellent source of energy and recreational facilities.
DISADVANTAGES OF VOLCANOES
When an eruption occurs:
- Pose a threat on the communities surrounding the volcano
- Bury adjacent communities in lahar and affect global climate
- People living in areas distant from the site can also be affected by the ash fall, poisonous gases, and lahar.
a vent on the earth’s surface that opens downward to a pool of molten rock, debris, and gases. Its formation involves the process of subduction
takes place when two plates converge
the place where the two plates converge and the volcano is formed (DOST-PHILVOCS, n.d.).
Reason for eruption
Accumulation of gases due to thickness of magma from silica content
Parts of volcanoes
- Volcanic bombs
- Ash, steam and gas
- Secondary cones
- Secondary vent
- Magma chamber
- Main vent
large underground pool of magma
magma, once it reaches the surface
bowl-shaped basin in the top of the volcano
central tube which magma travels through
eruptions from other vents may build up secondary cones on the flanks
material thrown out by the volcano
ash, steam and gas
larger material thrown out by the force of eruption