Volcanoes

Question 1

Are mountains that have the capacity to erupt at any time.

Answer 1

volcanoes

Question 2

mountain or hill, typicallyconical, having acrateror vent through which lava, rockfragments, hot vapor, and gas are being or have beeneruptedfrom the earth’scrust.

Answer 2

volcanoes

Question 3

Underneath the Earth’s surface, ___________ or molten rock is slowly being forced through the cracks or weaknesses on Earth.

Answer 3

magma

Question 4

When magma reaches the surface, it’s called __________

Answer 4

lava

Question 5

A Volcano may be classified as __________________ based on its life cycle.

Answer 5

Active, Dormant, or Extinct

Question 6

A ______________is classified as active if it has a tendency to erupt or if it is already erupting.

Answer 6

Volcano

Question 7

A ___________________ is classified when it is not erupting or is not going to erupt sometime in the near future .

Answer 7

Dormant Volcano

Question 8

PHIVOLCS refers to dormant volcanoes as “potentially active volcanoes” or in other terms they can be considered as ________________.

Answer 8

“Sleeping Volcanoes”

Question 9

_______________ are those that have not erupted in the last 30 000 to 40 000 years and are not expected to erupt any time soon

Answer 9

Extinct Volcanoes

Question 10

Though scientist believed that a phenomenon called __________________ may revive a volcano.

Answer 10

“rejuvenation”

Question 11

A _________________ are called such because they are formed by alternating layers of lava and pyroclastic materials from multiple eruptions that occurred through time.

Answer 11

Stratovolcano or composite volcano

Question 12

This type of volcano are typically tall mountains that have steep sides and are known to erupt violently.

Answer 12

stratovolcano

Question 13

The famous stratovolcano found here in the Philippines is the ___________________

Answer 13

Mayon Volcano in Bicol

Question 14

Generally low and has a dome shape, like the shield of medieval knights.

Answer 14

shield volcanoes

Question 15

These are mountains that have been slowly shaped by lava flows.

Answer 15

shield volcanoes

Question 16

it is one of the most Largest Shield Volcano.

Answer 16

Mauna Loa in Hawaii

Question 17

Considered to be the simplest type of volcano.

Answer 17

cinder cone volcanoes

Question 18

cinder volcanoes is the result of a single vent results in a bowl-shaped crater, which forms a ___________

Answer 18

summit

Question 19

Or central eruption happen due to the build up of thick magma with high silica content, having slow flowing and very viscous.

Answer 19

Explosive eruption

Question 20

These eruptions are rapid and very violent, the volcanoes spew out lava, ash, and other volcanic materials over large distances.

Answer 20

Explosive eruption

Question 21

Or Fissure Eruption, emits a lot of lava coming from a fissure or a crack on the surface.

Answer 21

quiet eruption

Question 22

Lava derived from magma with low silica content has low viscosity allowing gas to escape

Answer 22

quiet eruption

Question 23

A chain of volcanoes are called an ____________ wherein the current active volcanoes are found, such as the Bicol Arc where Mount Iriga (Asog), Mayon Volcano, and Mount Bulusan are found.

Answer 23

“arc”

Question 24

According to PHIVOLCS there are __ active volcanoes listed in the country.

Answer 24

23

Question 25

These volcanoes are monitored by the ______________________ or also known as PHIVOLCS

Answer 25

“Philippine Institute of Volcanology and Seismology”

Question 26

The agency serves as the arm of the government that studies, record, and gives forecasts about the behavior of active volcanoes, which help in mitigating the effects of volcanic eruptions.

Answer 26

PHILVOCS

Question 27

Mudflow composed of rocky debris, water, and pyroclastic material that flows down from a volcano, often along a river valley, having a cement-like consistency making it very dangerous.

Answer 27

lahar

Question 28

Volcanic ash or tephra is hard, extremely abrasive, mildly corrosive, conducts electricity when wet, and does not dissolve in water.

Answer 28

ash fall

Question 29

It is made up of small jagged pieces of rocks, minerals, and volcanic glass less than 2 millimeter in diameter (about the size of a sand).

Answer 29

ash fall

Question 30

High-density mixtures of hot, dry rock fragments and hot gases that move away from the vent that erupted them at high speeds, that are known to exhibit high temperature, some as high as 750*C like Mount Pinatubo.

Answer 30

pyroclastic flow

Question 31

Are basically rocks that an erupting volcano sends into the air.

Answer 31

ballistic projectile

Question 32

These blocks travel to distances as far as two to five kilometers away from the vent of a volcano, forming an arched ballistic trajectory like a cannonball.

Answer 32

ballistic projectile

Question 33

Are water vapors that makes up most of carbon monoxide, carbon dioxide, sulfur dioxide, hydrogen sulfide, hydrogen chloride, hydrogen fluoride, and helium.

Answer 33

volcanic gases

Question 34

These gases can react with water and from poisonous acids, particularly sulfur, chlorine, and fluorine.

Answer 34

volcanic gases

Question 35

These acids are very toxic and damaging to the skin, eyes, and lungs of animals and human even in small concentrations that can also destroy fabrics, metals, and vegetation.

Answer 35

volcanic gases

Question 36

Describe as a steam of molten rocks that flows out of a volcano or volcanic vent streaming down that can be very fluid or sticky depending on their composition and temperature.

Answer 36

lava flow

Question 37

A hot fluid lava can travel farther distances than the cooler, sticky type.

Answer 37

lava flow