I don't know, VOLCA-KNOWS!

Question 1

Philippines is situated between two tectonic plates, namely?

Answer 1

The Philippine Sea Plate and the Eurasian Plate

Question 2

The word Volcano comes from the Italian word (1) _________, which means “(2)__________________,” and also the Latin word (3)________, the (4)______________

Answer 2

(1) Vulcano
(2) burning mountain
(3) Vulcan
(4) Roman God of Fire

Question 3

Parts of a Volcano (8)

Answer 3

• Main vent
• Magma chamber
• Crater
• Lava flow
• Secondary vent
• Secondary cone
• Ash cloud
• Ash

Question 4

A vent, hill, or mountain that erupts, releasing molten rocks, rock fragments, and gaseous materials onto Earth’s surface.

Answer 4

Volcano

Question 5

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

Answer 5

Main vent

Question 6

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

Answer 6

Magma chamber

Question 7

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

Answer 7

Crater

Question 8

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

Answer 8

Lava flow

Question 9

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

Answer 9

Secondary vent

Question 10

This is formed when lava and ashes escape from smaller vents.

Answer 10

Secondary cone

Question 11

Secondary cones are also known as?

Answer 11

Parasitic cones

Question 12

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 volcanoes

Question 12

4 types of volcanoes according to shape

Answer 12

• Cinder cone volcano
• Composite volcano
• Shield volcano
• Lava dome

Question 12

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

Answer 12

Ash cloud

Question 12

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

Answer 12

Ash

Question 13

Typically symmetrical cones that are steep and may rise as high as 2 400 meters from the ground.

Answer 13

Composite volcanoes

Question 14

Composite volcanoes have acidic and sticky lava, which allows the lava to __________ without travelling very far.

Answer 14

solidify

Question 15

Composite volcanoes are usually active. True or False?

Answer 15

False. It is usually DORMANT for many years that they can be considered extinct.

Question 16

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

Answer 16

Shield volcanoes

Question 17

Shield volcanoes are not very explosive and are among the largest volcanoes in the world. True or False?

Answer 17

True

Question 18

3 types of volcanoes according to eruptive history

Answer 18

• Active
• Dormant
• Extinct

Question 19

These volcanoes have erupted during historical times within the last 600 years.

Answer 19

Active

Question 20

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

Answer 20

Dormant

Question 21

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

Answer 21

Extinct

Question 22

Why is it important to understand the different types of volcanic activities?

Answer 22

It enables is to predict the possibilities of eruptions in the future.

Question 23

3 different phases of volcanic eruption

Answer 23

Preparation phase, eruption phase, and ending phase

Question 24

An increase in seismic activity and steam or smoke coming out from the volcano can be observed.

Answer 24

Preparation phase

Question 25

The pressure will start to build up inside the magma chamber and the energy starts to increase for eruption.

Answer 25

eruption phase

Question 26

After the eruption, the chamber is now empty, which may trigger the walls of the conduit to weaken and to collapse.

Answer 26

Ending phase

Question 27

In general, volcanic eruptions may be classified as ___________ and _____________.

Answer 27

explosive and effusive

Question 28

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

Answer 28

Effusive eruptions

Question 29

Involve magma of high viscosity and high gas content.

Answer 29

Explosive eruptions

Question 30

In a more detailed classification scheme based on activity, volcanic eruptions are commonly divided into 6 major types.

Answer 30

- Hawaiian type - Strombolian type - Vulcanian type - Plinian type - Phreatic type - Phreatomagmatic type

Question 31

A type of volcanic eruption wherein fluid basaltic lava is thrown into the air, creating a lava fountain or lava flows.

Answer 31

Hawaiian type

Question 32

It is the most violent type of volcanic eruption among all types because it releases huge amounts of gases and ashes at great speeds.

Answer 32

Plinian type

Question 32

A type of volcanic eruption wherein there is a burst of glowing lava due to the bursting of gas bubbles at the vents of the volcano.

Answer 32

Strombolian type

Question 32

Strombolian eruptions creates eruptive products such as _______ and _________.

Answer 32

scoria and lava bombs

Question 32

A type of volcanic eruption, the eruption is short, explosive, and violent.

Answer 32

Vulcanian type

Question 33

A type of volcanic eruption, it is a steam-driven explosion.

Answer 33

Phreatic type

Question 34

It is a type of volcanic eruption that 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 onto the Earth's surface.

Answer 34

Phreatomagmatic type

Question 35

When a volcano erupts, it emits three types of materials. These are:

Answer 35

- Lava - Rock fragments - Gases

Question 36

It refers to magma that has been expelled onto Earth's surface.

Answer 36

Lava

Question 37

It refers to the pyroclastic materials and rock fragments that are being expelled during volcanic eruptions.

Answer 37

Tephra

Question 38

Large, dense pyroclastic rocks that cool in the air before they reach the ground.

Answer 38

Volcanic bombs

Question 38

4 types of pyroclastic materials

Answer 38

- Volcanic bombs - Volcanic ash - Lapilli - Volcanic blocks

Question 39

Volcanic bombs are commonly found in older ______ volcanoes.

Answer 39

shield

Question 40

Volcanic bomb is a mass of molten rock that is larger than ___ mm in diameter.

Answer 40

64

Question 41

A mixture of powder-sized rocks, minerals, and gas particles.

Answer 41

Volcanic ash

Question 42

Lapilli means "________" in Latin.

Answer 42

little stones

Question 42

Pyroclastic materials that are already solid when ejected during eruptions.

Answer 42

Volcanic blocks