volcanoes

Question 1

how do magma form

Answer 1

heated and pressured rocks

Question 2

what causes magma to form faster

Answer 2

rise in temp

drop in pressure

Question 3

where do most volcanoes occur

Answer 3

divergent and convergent boundaries

hot spots

Question 4

why have diff types of volcanoes

Answer 4

diff magma formation at each type of plate boundary

composition of magma differs in each tectonic setting

Question 5

determines the types of volcanoes that form and the types of eruption takes place

Answer 5

tectonic setting

Question 6

at what boundary, the litosphere becomes thinner as two plates pull away from each other

Answer 6

divergent

Question 7

a set of deep cracks firm in an area

Answer 7

rift zone

Question 8

what fills the rift zone

Answer 8

hot mantle rocks that rises

Question 9

(1) as the rock rises

Answer 9

decrease in pressure

Question 10

(2) hot mantle rock

Answer 10

melt

Question 11

(3) rocks melt

Answer 11

form magma

Question 12

the magma that reaches earth’s surface

Answer 12

lava

Question 13

what magma rises to the earth’s surface that erupts nonexplosively

Answer 13

basaltic magma

Question 14

the magma that feeds the eruption pools deep underground in a structure called

Answer 14

magma chamber

Question 15

at earth’s surface, lava is released through openings called

Answer 15

vents

Question 16

flowing lava in the interior travels through long, pipelike structures known as

Answer 16

lava tubes

Question 17

molten or liquid like rock within the earth

Answer 17

magma

Question 18

magma thy reaches earth’s surface

Answer 18

lava

Question 19

an opening through which molten (liquid-like) rock flows onto earth’s surface

Answer 19

vent

Question 20

how many central vents does volcanoes always have

Answer 20

one

Question 21

how many smaller side vents can a volcano have

Answer 21

several hahaha

Question 22

types of volcanoes

Answer 22

strato
cinder
shield

Question 23

usually form at hot spots, from non explosive eruption

Answer 23

shield

Question 24

form from explosive eruptions; very steep

Answer 24

cinder cone

Question 25

from both explove and non explosive eruptions

Answer 25

composite

Question 26

eruptions are mild and can occur several times

Answer 26

shield

Question 27

formed from many layers of runny lava

Answer 27

shield

Question 28

very wide, not too steep

Answer 28

shield

Question 29

biggest type of volcanoes

Answer 29

shield

Question 30

example of a shield volcano

Answer 30

mauna loa

Question 31

description of magma inside a shield volcano

Answer 31

rich in iron an magnesium | very fluid

Question 32

lava flowing out tends to flow great distances

Answer 32

shield

Question 33

flowing lava gives the volcano the shape of a gently sloping mountain

Answer 33

shield

Question 34

usually form at hot spots from non explosive eruption

Answer 34

shield

Question 35

smallest type of volcano

Answer 35

cinder cone

Question 36

most common

Answer 36

cinder cone

Question 37

made from pyroclastic material

Answer 37

cinder cone

Question 38

form a large crater

Answer 38

cinder cone

Question 39

explosive!

Answer 39

cinder cone

Question 40

magma has large amounts of gas trapped in it

Answer 40

cinder cone

Question 41

eruptions are violent and explosive because of all the gas trapped in the magma

Answer 41

cinder cone

Question 42

what forms the cone shape of cinder cone

Answer 42

large amounts of hot ash and lava thrown out of the vent

Question 43

usually only active for a short time and then become dormant

Answer 43

cinder cone

Question 44

cinder cone example

Answer 44

paricutin in mexico

Question 45

eruptions between explosive and non explosive

Answer 45

composite

Question 46

sometimes have runny lava layers | sometimes have pyroclastic materials

Answer 46

composite

Question 47

wide base | steep sides

Answer 47

composite

Question 48

composite example

Answer 48

mount fuji

Question 49

types of eruptions

Answer 49

explosive | non explosive

Question 50

volcanoes that build enough pressure to blow its top, sending pyroclastic material into the air

Answer 50

explosive

Question 51

build only enough pressure to allow lava to run down its sides

Answer 51

non explosive

Question 52

types of volcanoes

Answer 52

active dormant extinct

Question 53

erupts often

Answer 53

active

Question 54

sleeping not erupted a long time but might in the future

Answer 54

dormant

Question 55

dead | not erupted in 100,000 yrs

Answer 55

extinct

Question 56

can be used as a very fertile soil but also harmful

Answer 56

ash

Question 57

resources of volcanoes; energy extraction

Answer 57

geothermal

Question 58

a place where lava reaches the surface

Answer 58

volcano