Download Volcano Cloze Notes

Volcano Cloze Notes
EQ: What is a Volcano?
 ______________ is a vent of fissure in the Earth’s surface through which __________ and ________
are expelled.
 Magma is _________ rock _________ to the Earth’s surface
 ____________ is magma that flows onto the Earth’s surface
EQ: What are the 2 types of Volcanic Eruptions?
Non-Explosive:
 The most _____________type of eruption
 Produces relatively_________ flows of lava
 Found in much of the ___________, Northwest regions of the ________, & other vast regions on
Earth’s surface
 Examples: Mauna Loa & Kilauea in _____________
Explosive:
 They are _________, but very ___________________
 ______________of hot debris, ash, and ________ repeatedly shoot out of the volcano
 ___________________ flows erupt from the volcano producing __________ rock, which hardens in
the air, and dust sized particles of _______. The ash can reach the upper __________________ and
circle the Earth for years.
 The lava and large pieces of debris are _______________ out of the volcano in a matter of
______________. This can demolish an entire mountainside in seconds.
 Example: ______________________ in Washington state
EQ: What are the types of Volcanoes?
________________ Volcanoes
 Built of _____________of lava released from _______________________ eruptions.
 Lava is very ________________
 Layers of lava create a volcano with ____________ sides
 Not very ____________sides, but can grow to be enormous
 Tallest Mountain on Earth: Mauna Kea in Hawaii
____________________ Volcanoes
 Made of pyroclastic material from ________________ eruptions
 _____________ sides
 Small ____________________
 Erupt for _____________ periods of time
 Often occur in _________________ on sides of volcanoes
 ______________ away quickly because pyroclastic material is not cemented together
 _________________~ Mexican volcano appeared in a cornfield in 1943 and erupted for 9 years
_______________________ Volcanoes
 AKA: __________________________
 One of the most _______________ types of volcanoes
 Form from _________________ eruptions of pyroclastic material followed by quieter lava flows
 Lava and pyroclastic material form ___________________ layers
 ___________ bases and steeper towards the___________
 EX: Mt. Hood, Mt. Shasta, Mt. Ranier, and Mt. St. Helens (all in US); Mt. Fuji is in Japan
EQ: How does magma form and move?
Formation of Magma Forms in the lower ___________ & upper _______________
 Caused by changes in ___________ & ________________
 Usually the result of _________________ pressure
 Rises to the surface since magma is less _____________ than rock
 Usually, at plate __________________ Ex: Ring of Fire In Pacific Ocean
EQ: Where do Volcanoes Form?
@ Rift Zones
 Deep _____________ between ________________ plates, like the Mid-Ocean Ridge in the Pacific &
North Atlantic Oceans
 Remember __________________ Spreading
@ Convergent Boundaries/__________________ Zones
 At oceanic & continental plates
 Oceanic crust subducts under continental crust
 Oceanic ____________ mixes with the mantle __________, melts it & allows magma to _______
@ Hot Spots
 Volcanically active areas _______ from plate _____________________
 Example: Hawaiian Islands
EQ: How does a Scientist Predict a Volcano is going to Erupt?
Classified in 3 categories
 ______________: has ________ erupted in recorded history and probably will ________ erupt again
 Dormant: ____________ is _____ erupting, but the record of past _____________ suggests the
volcano will _________ again
 ____________: currently _____________ or shows signs of erupting ________ in the near future