Name: ______________________________
Date: _______________ Block: ___________
Volcano Notes (Abbreviated Version)
Volcano Stats
•
Definition of Volcano
– ______________________________________________________________________
______________________________________________________________________
•
Number of active volcanos = ?
– __________ erupting right now
(50-60/year) (160/decade)
•
Number of volcanologists = _____________________
Volcanic Eruptions


____________________________________________
____________________________________________
What is Lava?
___________________________________________________________________________
Volcanoes form around ______________ that release _______________ onto the Earth’s
Surface.
The Composition of Magma Determines whether it is explosive or not


High _________________ content
o More likely to be __________________________
High ________________ content
o More likely to be __________________________
o Why?
 _________________ has a thick, stiff consistency
 Flows ___________________
 Tends to Harden in the volcano’s _________________
What Erupts from a Volcano?

Lava can be thick or thin
o ____________________________
o ____________________________
o ____________________________
o ____________________________

Pyroclastic Material
o Rock fragments created by __________________ eruptions
o ________________explodes from volcano and solidifies in the air
o existing rock is __________________by powerful eruptions
 ____________________________
 ____________________________
 ____________________________
 ____________________________
How do Volcanoes affect the Earth?


______________________________________
o hot ash can flow really ________________________
 Knock down buildings
 Dam rivers (flooding/drought)
 Kill crops and livestock
__________________________________________
o Ash & Gases can block _______________________
 Drop average global temperature noticeably
Types of Volcanoes



___________________________________
___________________________________
___________________________________
Craters, Calderas, and Lava Plateau



____________________
o From explosions of material out of the vent and the collapse of material back into
vent
___________________
o Much larger depression that forms when magma chamber empties and its roof
collapses
___________________
o Forms when lava erupts from long cracks, or fissures, and spreads out evenly
(thousands of km)
What Causes Volcanoes?



The Formation of _______________________
o Mantle rock melts when the temperature _________________________ or the
pressure _______________________.
Where Volcanoes Form
o ________________________________
 _______________ world’s active volcanoes in ________________________
_________________________
How do Volcanologists predict eruptions?
o Measuring _____________________________
o Before eruption, increase in number & intensity
o Measuring _____________________________
o Bulges may form with magma _________________
o Measuring _____________________________
o Outflow of volcanic gases
 _______________________________________________________
o Measuring ________________________________________________
o Measure changes in temperature over time
You should not be a volcanologists it……
o You don’t like ________________________, _________________________,
_______________________, etc.
o You are not interested in experiencing extreme _______________________and
______________________.
o If you don’t like to _________________ to incredible places and see breathtaking views
of the _________________.