VOLCANOES

Question 1

Volcano comes from the italian word _____ which means burning mountain and ____ which means God of Fire.

Answer 1

Vulcano and Vulcan

Question 2

It is a Vent, hill, or mountain that erupts, releasing molten rocks, rock fragments, and gaseous materials onto Earth’s surface.

Answer 2

Volcano

Question 3

It is where magma passes through from the magma chamber to reach Earth’s surface.

Answer 3

Main Vent

Question 4

This is a large reservoir that stores molten rock (magma) prior to eruption.

Answer 4

Magma Chamber

Question 5

It is a bowl-shaped depression produced by volcanic activity and explosion.

Answer 5

Crater

Question 6

This is the stream of molten rock flowing out of the crater.

Answer 6

Lava Flow

Question 7

This is an alternative smaller outlet where magma escapes to reach Earth’s surface.

Answer 7

Secondary Vent

Question 8

This is formed when lava and ashes escape from smaller vents; it is also known as a parasitic cones.

Answer 8

Secondary Cone

Question 9

It is formed when thick volcanic ashes are discharged into the atmosphere caused by violent explosion or eruption of the volcano.

Answer 9

Ash Cloud

Question 10

It is a mixture or rocks, minerals, and glass particles expelled during a volcanic eruption.

Answer 10

Ash

Question 11

Enumerate the Anatomy of a Volcano

Answer 11

Main Vent
Magma Chamber
Crater
Lava Flow
Secondary Vent
Secondary Cone
Ash Cloud
Ash

Question 12

These are formed from pyroclastic fragments and volcanic ashes that form and solidify around the main vent to form a cone, which can be either circular or oval.

Answer 12

Cinder Cone

Question 13

These are typically symmetrical cones that are steep and may rise as high as 2 400 meters (about 8000 feet) from the ground. It is also known as ____

Answer 13

Composite Volcano and Stratovolcano

Question 14

These are formed from non-acidic basaltic lava flows of high viscosity producing broad sloping sides and shield-like structures.

Answer 14

Shield Volcanoes

Question 15

Enumerate the types of Volcanoes according to Shape

Answer 15

Cinder Cone
Composite or Stratovolcano
Shield Volcano

Question 16

These volcanoes have erupted during historical times, they have erupted at least once in the past 10,000 years based on the analysis of materials from volcanic deposits.

Answer 16

Active Volcano

Question 17

These volcanoes are active but not erupting; however, they are expected to erupt anytime soon.

Answer 17

Dormant Volcano

Question 18

These volcanoes have not had any eruption in the past 10,000 years and are expected not to erupt anymore in the future.

Answer 18

Extinct Volcano

Question 19

Enumerate the types of Volcanoes According to Eruption

Answer 19

Active
Dormant
Extinct

Question 20

How many active volcanoes are there in the Philippines?

Answer 20

24 Active Volcanoes

Question 21

This Phase of a Volcanic Eruption is where the magma chamber is being led with magma, an increase in seismic activity and steam smoke coming out from the volcano can be observed.

Answer 21

Preparation Phase

Question 22

This Phase of a Volcanic Eruption is where the pressure will start to build up inside the magma chamber and the energy starts to increase for eruption.

Answer 22

Eruption Phase

Question 23

This Phase of a Volcanic Eruption is where the magma chamber is now empty, which may trigger the walls of the conduit to weaken and to collapse into a crater or a caldera.

Answer 23

Ending Phase

Question 24

Enumerate the Phases of a Volcanic Eruption.

Answer 24

Preparation phase
Eruption Phase
Ending Phase

Question 25

Volcanic Eruptions can be classified into two, what are them?

Answer 25

Effusive and Explosive Eruption.

Question 26

It involves the outpouring of basaltic magma that is relatively low in viscosity and low in gas content.

Answer 26

Effusive Eruption

Question 27

It involves magma of high viscosity and high gas content.

Answer 27

Explosive Eruption

Question 28

Enumerate the types of Volcanic Eruptions

Answer 28

Hawaiian Strombolian Vulcanian Plinian Phreatic Phreatomagmatic

Question 29

fluid basaltic lava is thrown into the air, creating a lava fountain or lava flows. The lava flows create gentle slopes, which then form shield volcanoes that are usually large or covers a large area.

Answer 29

Hawaiian

Question 30

There is a burst of glowing lava due to the bursting of gas bubbles at the vents of the volcano. This eruption creates eruptive products such as ___ and ___.

Answer 30

Strombolian Scoria and Lava Bombs.

Question 31

The eruption is short, explosive, and violent. This happens when the pressure is enough to blow off the overlying layer of of solidified sol lava over the entrapped gases in magma.

Answer 31

Vulcanian

Question 32

It is the most violent among all types of volcanic eruptions. It releases huge amounts of gases and ashes at great speeds. These eruptions are usually destructive to land and property.

Answer 32

Plinian

Question 33

It is a steam-driven explosion. When magma heats the surface or ground water, the water begins to boil or directly produce steam that causes the explosion. These eruptions often precede or accompany another type of volcanic eruption.

Answer 33

Phreatic

Question 34

It involves the eruption of magma that reacts to external water; the interaction between magma and water results in an explosion that releases steam and pyroclastic fragments into Earth's surface.

Answer 34

Phreatomagmatic

Question 35

Enumerate the Pyroclastic Materials

Answer 35

Volcanic Bombs Volcanic Ash Lapilli Volcanic Blocks