volcanoes in general

Question 1

what is magma

Answer 1

molten rock found in mantle

Question 2

what is lava

Answer 2

molten rock found at earths surface

Question 3

example of composite volcano

Answer 3

mt etna

Question 4

what is a composite volcano

Answer 4

larger classic volano with alternating layers of ash and lava

violent and gentle eruptions

Question 5

example of culdera

Answer 5

santorini

Question 6

what is a culdera

Answer 6

build up of gasses blows top off volcano and clears magma chamber sides of volcano subside - lagoon can form in middle

Question 7

what is ash cinder cone volcano

Answer 7

ash and cynder build up to form a cone

Question 8

ash cinder cone example

Answer 8

mount fuji japan

Question 9

dome volcano example

Answer 9

mt pelee

Question 10

what is a dome volcano

Answer 10

lava quickly solidifies when exposed to air

steep spine can form

Question 11

shield volcano example

Answer 11

mauno loa

Question 12

what is a shield volcano

Answer 12

lava out of central vent

gentle sides

many layers of basaltic lava

Question 13

fissure example

Answer 13

iceland = heimay eruption

Question 14

what is a fissure

Answer 14

two plates move apart , lava ejected through linear volcanic vent rather than one central vent

Question 15

types of basaltic lava

Answer 15

Aa Aa lava

Pahoehoe lava

Question 16

what the three main types of lava

Answer 16

basaltic
andesitic
rhyolitic

Question 17

order types of lava in viscosity

Answer 17

basaltic > andesitic > rhyolitic

lowest highest

Question 18

how hot is basaltic lava

Answer 18

1100-1200

Question 19

what is frequency and magnitude of basaltic eruptions

Answer 19

eruptions frequent but gentle

Question 20

where do basaltic lava usually occur

Answer 20

constructive plate

Question 21

what sort of slopes does basaltic produce

Answer 21

gentle

Question 22

what is AaAa lava texture and why

Answer 22

rough texture as when it cools it fractures

Question 23

pahoe hoe texture

Answer 23

flows and solidifies smoothly

Question 24

temp of andesitic lava

Answer 24

800 degrees

Question 25

speed of lava for andesitic

Answer 25

slow

Question 26

type of eruption for andesitic

Answer 26

violent

Question 27

sort of sides andesitic produced

Answer 27

steep

Question 28

where does andesitic lava usually founded

Answer 28

destructive plate boundary

Question 29

temp of rhyolitic lava

Answer 29

700

Question 30

eruption type for rhyolitic lava

Answer 30

very explosive

Question 31

how fast is rhyolitic lava

Answer 31

very slow to none

Question 32

gas content of rhyolitic lava

Answer 32

high gas content

Question 33

examples of volcanic gases

Answer 33

water co2 so2

Question 34

what was the invisible killer volcano

Answer 34

lay nyos gas eruption

Question 35

how many people were killed in lake nyos eruption

Answer 35

1700

Question 36

how were people killed in lake nyos murder

Answer 36

co2 and water mixed making it denser than 02 so it hugged ground

Question 37

tephra

Answer 37

rock fragments ejected into the air

Question 38

pyroclastic flows

Answer 38

dense destructive mass of hot ash flows at great speed

Question 39

lahars

Answer 39

mudflow that originates from volcano sides

Question 40

how to manage volcano

Answer 40

manage
prepare
protect
adapt

Question 41

how to monitor volcano

Answer 41

use drones, monitor land swells , monitor gas emmisions look at past records

Question 42

how to prepare

Answer 42

hazard mapping
evacuation practice
food and water supplies

Question 43

protection against volcano

Answer 43

dig trenches
build barriers
gas mask
water systems to slow flow

Question 44

how to adapt

Answer 44

timber homes so that they can be moved

stonger rooves to withstand ash