Magma

Question 1

type of magma. has low silica content and gas and viscosity. relatively high temperature

Answer 1

Basaltic/Mafic Magma

Question 2

type of magma. high gas and silica content

Answer 2

Andesitic/Intermediate Magma

Question 3

type of magma. highest silica and gas content, most explosive. low temperature

Answer 3

Rhyolitic/Felsic Magma

Question 4

effusive outpourings of lava

Answer 4

Lava flows

Question 5

fountain of runny lava from a vent line or vents

Answer 5

Lava fountains

Question 6

mounds that form when viscous lava is erupted

Answer 6

Lava domes

Question 7

type of lava. forms a think, brittle crust as it cools. Torn into sharp pieces as lava moves underneath it

Answer 7

Aa

Question 8

type of lava. thin, flexible crust as it cools. The crust wrinkles as the lava moves underneath it

Answer 8

Parahoehoe

Question 9

type of lava. cool stiff lava that does not travel very far

Answer 9

Blocky Lava

Question 10

type of lava. cools down very fast, underwater

Answer 10

Pillow Lava

Question 11

are mixtures of fragmented volcanic particles, hot gases and ash

Answer 11

Pyroclastic Density Currents

Question 12

form when ash and dust race down the side of a volcano like a river. Move at 200km/h

Answer 12

Pyroclastic Flows

Question 13

being more dilute, more mobile currents

Answer 13

Pyroclastic Surge

Question 14

are large blobs of lava that harden in the air

Answer 14

Volcanic bombs

Question 15

are small bits of lava that harden before they hit the ground. size of pebbles

Answer 15

Lapili

Question 16

forms when gases trapped in magma or lava form bubbles. When bubbles explode, they create millions of tiny pieces

Answer 16

Volcanic ash

Question 17

large pieces of solid rock that come out of the volcano

Answer 17

Volcanic blocks

Question 18

type of eruption. steam-driven eruption as hot rocks come in contact with water

Answer 18

Phreatic

Question 19

type of eruption. violent eruption as contact between water and new magma happens.

Answer 19

Phreatomagmatic

Question 20

type of eruption. weak, relatively mild blasts. fountain lava

Answer 20

Strombolian

Question 21

type of eruption. tall eruption columns that reach up to 20km high with pyroclastic flow and ashfall tephra. dense cloud of ash laden gas

Answer 21

Vulcanian

Question 22

type of eruption. excessively explosive type of eruption gas and pyroclastics

Answer 22

Plinian