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Volcanoes Flashcards | StudBud
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Volcanoes
Volcanoes
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#Volcanoes
Flashcards
28 cards
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Practice quiz
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Questions
28
Answers
1
Which lava flow is ropy in texture when dry?
Pahoehoe
Lapilli
blocky lava
Aa
2
Choose the correct volcano
Mountain volcano
Composite volcano
Cinder cone
Shield volcano
3
Choose the correct volcano
Behemoth volcano
Shield volcano
Composite volcano
Cinder cone
4
The vent in Earth surface where magma and gases are released
Plate boundary
Fault zone
Volcano
Earthquake
5
What are mid-ocean ridges?
Caves in the middle of the ocean.
Non-volcanically active mountain ranges undersea
Volcanically active mountain ranges undersea
Valleys in the middle of the ocean
6
Which lava has a higher viscosity?
mafic
felsic
7
What is a subduction zone?
Where one tectonic plate moves above another one
Where one tectonic plate moves under another one
Where one tectonic plate collides with another.
Where one tectonic plate moves across another one
8
What is a pluton?
Metamorphic rock formed underground.
Igneous rock that is formed underground
Igneous rock formed above ground.
Metamorphic rock formed above ground.
9
What are hot spots?
Popular clubs
Popular cities
Volcanically active areas far from tectonic plate boundaries
Volcanically active areas along tectonic plate boundaries.
10
What is the Pacific Ring of Fire
A zone of volcanoes around America
A major zone of active volcanoes around Pacific Ocean
A zone of volcanoes along the Atlantic Ocean
The ring from Lord of the Rings
11
What is the scale used to rate volcanoes?
The volcanic boom boom scale
The magnitude scale
Volcanic explosivity scale
Mercalli Scale
12
Identify this image
composite volcano
Caldera
shield volcano
cinder cone
13
Which lava breaks into large chunks when cooled?
Aa lava
Pahoehoe
Lapilli
Blocky lava
14
Which type of pyroclastic material is the smallest?
Volcanic dust
Volcanic ash
volcanic bombs
Lapilli
15
What is magma?
Melted steel
Melted metal
Hot water
Liquid rock
16
Where do most volcanoes occur?
In Asia.
Tectonic plate boundaries
There is no pattern
In the United States
17
Describe mafic magma
Less dense than felsic magma
Dark in color, rich in magnesium and iron
Light in color, rich in silica and feldspars
Usually found in continental crust
18
Which lava flow forms sharp rocks when cool?
Pahoehoe
Volcanic bombs
Aa lava
Blocky lava
19
How were the Hawaiian Islands formed?
From diverging continents
From converging continents
From hot spots
From volcanoes along plate boundaries
20
Can volcanic eruptions be predicted?
Yes
No
Sometimes
Maybe
21
What causes many volcanic eruptions?
Human activity
Movement of tectonic plates
The atmosphere
Tsunamis
22
What's the difference between magma and lava?
There is no difference.
Magma is underground, lava is above ground.
Lava is underground, magma is above ground.
They are used interchangeably.
23
Which type of lava is usually found in oceanic crust?
felsic
mafic
24
Why is most of the mantle solid rock?
The pressure
The volume
The temperature
The heat
25
Why does magma rise upward towards the surface?
The densities are the same.
Gravity pulls down the less dense material.
Magma is less dense than the surrounding rock.
Magma is more dense than the surrounding rock.
26
Describe felsic magma
more dense than mafic magma
Dark in color, rich in magnesium and iron.
Light in color, rich in feldspars and silica
usually found in oceanic crust
27
What is volcanism?
When magma is trapped under ground.
When melted rock solidifies.
When rock is melted
Any activity that moves magma onto Earth's surface.
28
Choose the correct volcano.
Monstrous volcano
Shield volcano
Composite volcano
Cinder cone
