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Volcanoes! Flashcards | StudBud
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Volcanoes!
Volcanoes!
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StudBud Administration
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Middle School Earth Science Chapter 6
Flashcards
20 cards
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Practice quiz
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Questions
20
Answers
1
What is the crater of the volcano?
A long tube that connects the magma chamber to the surface
The area covered by lava as it pours out of the vent
a bowl-shaped area forms at the top around the central vent
Where magma collects in pocket below.
2
Materials build up around the vent in a steep, cone-shaped hill
Lava Plateau
Shield Volcano
Composite Volcano
Cinder Cone Volcano
3
Magma becomes lava when it reaches a volcano's
pipe
geyser
magma chamber
vent
4
Which type of eruption creates pyroclastic flow?
Quiet
Explosive
5
What is a hazard of a quiet eruption?
large areas covered with thick lava
Ash, gases, and cinders cover homes
hot clouds of deadly gas
heavy ash causes roofs to collapse
6
What are 3 stages of volcanic activity?
dead, alive, sleeping
Dormant, active, extinct
Sleeping, active, unstable
Active, lazy, erupting
7
What is pyroclastic flow?
sticky lava
Slow streaming flow of lava down a hill side
explosive eruption that hurls mixture of gases, ash, & bombs
Lava exploding into the air
8
Where is the Ring of Fire located?
Along every plate boundary
Where oceanic plates collide
The rim of the Pacific Ocean
Where oceanic and continental plates collide
9
Which type of eruption is high in silica?
Explosive
Quiet
10
When does a hot spot volcano form?
Over continental plate boundaries on land
When magma erupts through the crust and reaches the surface
The oceanic plate subducts and melts to magma
11
Which type of crust is high in silica?
Continental
Oceanic
12
What is the type of rock that determines the thickness of magma, and thus the type of eruption?
Formica
Silica
Mica
Limestone
13
Which is most dangerous?
A hot spot volcano
An extinct volcanoe
A volcano that has been inactive for hundreds of years
A volcano that erupts frequently
14
Describe the eruption: The Hawaiian Islands were created from this type of eruption
Quiet
Explosive
15
What is a volcano?
Magma that has reached the surface
Weak spot in crust where molten material comes to surface
Molten mixture of rock forming substances
The rim of the Pacific Ocean
16
Lava flows gradually build a wide, gently sloping mountain.
Cinder Cone Volcano
Lava Plateau
Composite Volcano
Shield Volcano
17
Describe the eruption: Mt. Pinatubo spewed huge amounts of ash that rose high in the atmosphere
Explosive
Quiet
18
Layers of lava alternate with layers of ash
Composite
Shield
Cinder Cone
Lava Plateau
19
What is a geyser?
fountain of water and steam from the ground
deep hole in the ocean floor
Dormant fountain that stays very cold
Body of water that streams slowly.
20
Where do volcanoes form?
Oceanice crust
Along plate boundaries
Continental crust
all of the above
