Features of a volcano

Question 1

The entrance of a volcano

Answer 1

Throat

Question 2

The most striking part of the volcano.

Answer 2

Cone

Question 3

The large underground pool of liquid rock found beneath the Earth’s crust.

Answer 3

Magma Chamber

Question 4

Sills is also known as

Answer 4

Intrusive sheets

Question 5

The rock or magma expelled from a volcano during eruption.

Answer 5

Lava

Question 6

In lava, the temperature upon EJECTION can reach up to

Answer 6

700°C

Question 7

A basin-like depression over a vent at the summit of the cone

Answer 7

Crater

Question 7

It is usually composed of mixtures of lava and pyrocalstic. It can also vary in size and shape depending on the type of magma that is ejected by a particular volcano.

Answer 7

Cone

Question 8

The highest point or apex of a volcano

Answer 8

Summit

Question 9

The side of a volcano

Answer 9

Flank

Question 10

A volcanic depression much larger that the original crater

Answer 10

Caldera

Question 10

Are found in igneous forms that under great pressure, cut fractures or fissures across previously formed metamorphic, sedimentary, or igneous rocks.

Answer 10

Dikes

Question 10

Are solidified lava flows that originally forced their way between and parallel to older layers of rocks

Answer 10

Sills

Question 11

A channel or pipe conveying liquid materials such as magma

Answer 11

Conduit

Question 11

The opening through which an eruption takes place.

Answer 11

Vent

Question 12

The barrier or obstacles in a volcano.

Answer 12

Dikes

Question 13

Expelled in the atmoshpere

Answer 13

Ash cloud

Question 14

Also called mudflows

Answer 14

Lahar

Question 14

Also called mudflows

Answer 14

Lahar

Question 15

Fast-moving currents of hot gases and rock travelling downhill from a volcano.

Answer 15

Pyroclastic flow

Question 16

Is composed of pulverized rock and glass created during eruption.

Answer 16

Ash cloud

Question 17

The chunks of lava blasted into the air which solidify before reaching the ground.

Answer 17

Volcanic Bombs

Question 18

Glowing eruption cloud called

Answer 18

Nuee Ardent and avalanche

Question 19

Refers to fragmented material that consists of pumice, scoria, lithic materials, or crystals, or combination of the four.

Answer 19

Tephra fall

Question 20

Particles less than 2mm diameter is called

Answer 20

Ash

Question 21

Particles that measure 2-64 are called

Answer 21

Lapilli

Question 22

Particles bigger than 64 m in diameter are called

Answer 22

Blocks and bombs

Question 23

They are classified as primary or hot which are directly associated with volcanic eruption or cold when they are caused by heavy rainfall.

Answer 23

Lahar

Question 24

This main part of a volcano supplies the magma from the underlying source to the top of the volcano.

Answer 24

Vent

Question 25

They can be straight or convoluted.

Answer 25

Vent

Question 26

Are flowing mixture of volcanic debris and water.

Answer 26

Lahar