Volcanoes

Front 1

describe nonexplosive eruptions

Back 1

runny lava that seeps out and does not shoot into the air.

Front 2

describe explosive eruptions

Back 2

in an explosive eruption clouds of hot debree and gasses shoot into the air at supper sonic speeds

Front 3

explain how magma composition causes different types of eruptions

Back 3

if there is a high rate of silica in it it will be explosive if there is water then it will not be explosive

Front 4

name the two major categories of material that erupt from a volcano

Back 4

lava and pyroplastic myterial

Front 5

describe the parts of a volcano

Back 5

vent creater or central vent magma chamber

Front 6

name and describe the different types of lava

Back 6

block lava it dosent travel fare because it is so large.
pohoehoe the lava cools slowly makeing it look like waves.
Aa stiff surfas but hot underneath
Pillo lava cools quickly and looks like pillows.

Front 7

name and describe the 3types of volcanoes

Back 7

sheild Largest it is normaly non explosive and very runny so it is wide but not that tall.
Vomposit wide at bottom then small at the top.
cinder cone erodes quickly and is in size between the sheild and the composite.

Front 8

define the following terms crater caldera lava platiau

Back 8

creater central vent
caldera happens when magma chamber is empty and the roof colapses.
Lava platou is when the is a rift or a crack in the ground that lava comes out of and builds up to make a platou

Front 9

how does magma form

Back 9

when there is a rise in temperature and a decrease in preasure.

Front 10

where do volcanoes form

Back 10

they form were techtonic plates colide then preasure decreases and the mantal melts to magma. this area is also called the ring of fire

Front 11

whatis the ring of fire

Back 11

it is the area around one techtonic plate that all the volcanoes are next to.

Front 12

what are hot spots

Back 12

they are magma chambers were techtonic plates have shifted over it and form new volcanoes.

Front 13

what are some ways that humans try to predict volcanoes

Back 13

they use sismographes because normaly right before an eruption there are lots of small earth quackes.