INTRODUCTION TO VOLCANOES AND THEIR TYPES

Question 1

Study to relief features of the Earth’s crust

Answer 1

Geomorphology

Question 2

Refers to vertical and Horizontal movement of the crust

Answer 2

Diastrophism

Question 3

Physical removal of the rock or wearing down of landmasses by geomorphic agent

Answer 3

Erosion

Question 4

Processes associated with the surface discharge of magma or hot water

Answer 4

Vulcanism

Question 5

Ground water beneath the shallow surface is heated up until is explodes into boiling water and steam

Answer 5

Geysers

Question 6

Emit mixture of steam and other gases such as hydrogen sulfide

Answer 6

Fumaroles

Question 7

Occurs in many geothermal areas where the surface of the earth intersects the water table

Answer 7

Hot springs

Question 8

Typically cone-shaped hill or mountain formed by the extrusion of lava or ejection of rock fragments from a vent

Answer 8

Volcano

Question 9

A belt of volcanoes that rings the pacific ocean

Answer 9

Circle of Fire

Question 10

Most striking part of the volcano, usually composed of mixtures of lava and pyroclastic

Answer 10

Cone

Question 11

Opening through which an eruption takes place

Answer 11

Vent

Question 12

Large underground pool of liquid rock found beneath the earth’s crust

Answer 12

Magma chamber

Question 13

Basin-like depression over a vent at the summit of the cone

Answer 13

Crater

Question 14

Volcanic depression much larger than the original crater

Answer 14

Caldera

Question 15

Rock or magma expelled from a volcano during eruption

Answer 15

Lava

Question 16

Barrier or obstacles in a volcano

Answer 16

Dikes

Question 17

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

Answer 17

Sills

Question 18

Channel or pipe conveying liquid materials such as magma

Answer 18

Conduit

Question 19

The side of the volcano

Answer 19

Flank

Question 20

Highest point or apex of volcano

Answer 20

Summit

Question 21

Entrance of the volcano

Answer 21

Throat

Question 22

Expelled from the atmosphere

Answer 22

Ash cloud

Question 23

Chunks of lava blasted into the air which solidify before reaching the ground

Answer 23

Volcanic Bombs

Question 24

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

Answer 24

Tephra Fall

Question 25

Flowing mixture of volcanic debris and water

Answer 25

Lahar