Volcanoes (eruption types and styles)

Question 1

when magma rises to the surface and forms lava and ash deposits

Answer 1

Volcanic Eruptions

Question 2

only lava flows - lava flows exclusively

Answer 2

Effusive Eruption

Question 3

low viscosity (flows fast) in sheets or shoots

Answer 3

Effusive Eruptionp

Question 4

produces pyroclastic debris due to sudden release of built-up pressure

Answer 4

Explosive Eruption

Question 5

dense but fast moving lava

Answer 5

Explosive Eruption

Question 6

driven by thermal expansion of dissolved gas (high pressure and temperature)

Answer 6

Magmatic Explosions

Question 7

in magmatic explosions, viscosity determines

Answer 7

explosivity

Question 8

most powerful type of explosion

Answer 8

plinian

Question 9

in plinian eruptions, ashes can rise up to ____meters or ___ miles

Answer 9

50k meters, 10 miles

Question 10

ashes rise up to 50,000/10 miles

Answer 10

plinian

Question 11

dense gas loaded with ash that explodes from crater

Answer 11

vulcanian

Question 12

what is the cause of loud explosions in vulcanian

Answer 12

very thick/viscous lavar

Question 13

runny lava

Answer 13

icelandic

Question 14

runny lava flows through long cracks called

Answer 14

fissures

Question 15

____ can run up to 15 miles

Answer 15

icelandic

Question 16

icelandinc can run up to ___ miles

Answer 16

15

Question 17

shower of weak explosions

Answer 17

strombolian

Question 19

steam-driven from water

Answer 19

phreatic

Question 19

lava fragments form luminous arcs

Answer 19

strombolian

Question 19

when water is heated with magma, water boils and burst to steam

Answer 19

phreatic

Question 20

when water and lava meets

Answer 20

phreatomagmatic