Volcano

Question 1

Italian word vulcano, which means

Answer 1

burning mountain

Question 2

Latin word Vulcan

Answer 2

Roman God of fire

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 rocks (magma) prior year 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

Is a vent hill or mountain that erupts releasing molten rocks rock fragments and gaseous materials onto earth’s surface

Answer 6

Volcano

Question 7

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

Answer 7

Lava flow

Question 8

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

Answer 8

Secondary vent

Question 9

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

Answer 9

Secondary cone

Question 10

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

Answer 10

Ash cloud

Question 11

It is a mixture of rocks minerals and glass particles expelled during a volcanic eruption

Answer 11

Ash

Question 12

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 volcano

Question 13

Also known as stratovolcanoes are typically symmetrical cones that are steep and may rise as high as 2 400 meters from the ground

Answer 13

Composite volcanoes

Question 14

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

This volcanoes have erupted during historical times within the last 600 years in addition they have erupted at least once in the past 10,000 years

Answer 15

Active

Question 16

This volcanoes are active but not erupting however they are expected to erupt anytime soon

Answer 16

Dormant

Question 17

This volcanoes have not had any eruption in the past 10,000 years and are expected not to erupt anymore in the future. This volcanoes have been intensively weathered and eroded

Answer 17

Extinct

Question 18

Types of volcano according to shape

Answer 18

Cinder cone volcanoe, composite volcanoes or stratovolcanoes and shield volcanoes

Question 19

Types of volcanoes according to eruptive history

Answer 19

Active, dormant and extinct

Question 20

3 Phases of a volcanic eruption

Answer 20

Preparation phase, eruption phase and ending phase

Question 21

The magma chamber is being filled with magma an increase in seismic activity and steam or smoke coming from the volcano can be observed

Answer 21

Preparation phase

Question 22

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

The magma flows up from the volcano and cools to became

Answer 23

Lava

Question 24

After the eruption the magma chamber is now empty

Answer 24

Ending phase

Question 25

Types of volcanic eruptions

Answer 25

Effusive eruptions, explosive eruptions, hawaiian type, strombolian type, volcanian type, plinian eruption, phreatic eruption and phreatomagmatic eruption

Question 26

In general volcanic eruptions may be classified as

Answer 26

Effusive and explosive eruptions

Question 27

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

Answer 27

Effusive eruption

Question 28

It Involves magma of high viscosity and high gas content

Answer 28

Explosive eruptions

Question 29

Fluid basaltic lava is thrown into the air creating a lava fountain or lava flows

Answer 29

Hawaiian type

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 scoria ( hardened chunks of bubbly lava) and lava bombs

Answer 30

Strombolian type

Question 31

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

Answer 31

Volcanian type

Question 32

The most violent among all types of volcanic eruptions it releases huge amounts of gases and ashes at great speed

Answer 32

Plinian eruption

Question 33

Is a steam-driven explosion. when magma heats the surface or groundwater the water begins to boil or directly produce steam that causes the explosion.

Answer 33

Phreatic eruption

Question 34

Involve the eruption of magma that reacts to external water the interaction between magma and water results in explosion that releases steam and pyroclastic fragments into earth’s surface

Answer 34

phreatomagmatic eruption

Question 35

Refers to magma that has been expelled onto earth’s surface

Answer 35

Lava

Question 36

Refers to the pyroclastic materials and rock fragments that are being expelled during volcanic eruptions

Answer 36

Tephra

Question 37

A mass of molten rock that is larger than 64 mm in diameter large dense cyroclastic rocks that cool in the air before they reach the ground

Answer 37

Volcanic bombs

Question 38

A mixture of powder sized rocks minerals and gas particles

Answer 38

Volcanic ash

Question 39

Means little stones in latin pyroclastic materials that are range from 4 to 32 mm in diameter

Answer 39

Lapilli

Question 40

Pyroclastic materials that are already solid when ejected during eruptions more angular because they are not shape and cool in the air just like volcanic bombs

Answer 40

Volcanic blocks

Question 41

Good effects

Answer 41

Geothermal energy, nutrients in the soil, global cooling

Question 42

Bad effects

Answer 42

Breathing problems, damage to crops and propertied, lahar