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WorksheetsVolcanoes
Total questions: 50
Worksheet time: 1hrs 22mins
Name
Class
Date
1.
What is the opening at the top of a volcano called?
a)
side vent
b)
central vent
c)
vent
d)
crater
2.
What is a dent or depression called on a volcano?
a)
side vent
b)
bump
c)
dent
d)
crater
3.
A low silica volcano makes what type of explosion
a)
quiet eruption
b)
explosive eruption
4.
A high silica volcano makes what type of an explosive?
a)
quiet eruption
b)
explosive eruption
5.
What is the spread of lava as it pours out of a vent?
a)
magma chamber
b)
pipe
c)
lava flow
d)
crater
6.
A sleeping volcano is called what?
a)
active
b)
dormant
c)
extinct
7.
Which of these is NOT a type of volcano?
a)
Shield
b)
Super
c)
Composite
d)
Cinder
8.
What type of volcano is built almost entirely from ejected lava fragments?
a)
cinder cone
b)
composite cone
c)
shield volcano
d)
pahoehoe volcano
9.
What are fast moving clouds of gas, ash, and rock bombs that are products from an explosive eruption?
a)
ash fall
b)
effusive debris
c)
magma
d)
pyroclastic flows
10.
What are places in the interior of plates where volcanoes occur?
a)
effusive zones
b)
fault lines
c)
hot spots
d)
national parks
11.
A shield volcano is the tallest and most explosive volcano.
a)
True
b)
False
12.
What is a hot spot?
a)
An area in the interior of a plate where hot magma escapes Earth's crust.
b)
An area where you can get wireless internet.
c)
A place on your skin that burns.
d)
A popular place to hang out.
13.
What type of volcano is this..
a)
Shield
b)
Cinder Cone
c)
Composite or Stratovolcano
14.
What type of volcano is this..
a)
Shield
b)
Cinder Cone
c)
Composite or Stratovolcano
15.
Which volcano is a wide, gently sloping mountain formed by thin layers or lava that pour out of a vent and harden on top of previous layers?
a)
cinder cone
b)
composite or stratovolcano
c)
shield
d)
dome mountain
16.
A dense mud flow that results when snow and ice melts during an eruption and combines with volcanic ash and debris is a(n)
a)
Pyroclastic flow
b)
Slumping
c)
Lahar
d)
Dirt Current
17.
A huge hole left behind when a volcano collapses is a __________.
a)
caldera
b)
volcanic neck
c)
sill
d)
vent
18.
Volcanoes erupt because lava contains gases that expand when heated.
a)
true
b)
false
19.
The ____________ is a belt of volcanoes around the rim of the Pacific Ocean.
a)
island arc
b)
Ring of Fire
c)
caldera
d)
hot spot
20.
When magma that is low in silica erupts, it erupts explosively.
a)
True
b)
False
21.
In a pyroclastic flow a volcanic eruption consists of
a)
ash
b)
cinders
c)
lava
d)
ash, cinders, bombs, and gases.
22.
As magma rises towards the surface it collects in a 'room' called a _____ _____ .
a)
magma chamber
b)
side vent
c)
main vent
d)
lava chamber
23.
Lava begins as
a)
water
b)
crust
c)
magma
d)
pumice
24.
A volcano that is erupting or has shown signs that it may erupt in the future is called _____.
a)
sleeping
b)
extinct
c)
active
d)
dormant
25.
What is A?
a)
conduit
b)
magma chamber
c)
lava flow
d)
crater
26.
How thick something is or the ability of a fluid or liquid to flow is its
a)
viscosity
b)
density
c)
velocity
d)
flowability
27.
An opening in Earth's crust
a)
Volcano
b)
Lava
c)
Island Chain
d)
Hot Spot
28.
A plate moving over a stationary pool of magma
a)
Volcano
b)
Lava
c)
Island Chain
d)
Hot spot
29.
A cinder cone erupts tephra
a)
False
b)
True
30.
What kind of volcano is made of alternating layers of lava and tephra? (also called strata volcano)
a)
composat
b)
composite
c)
cinder
31.
Lava that looks like round lumps of marshmallow.
a)
pillow lava
b)
mushy lava
c)
glue
d)
white lava
32.
A slightly stiffer lava pours out quickly and forms a brittle crust.
a)
Aa lava
b)
Ab lava
c)
composite lava
d)
volcanic ash
33.
The composition of magma determines its _____.
a)
viscosity
b)
darkness
c)
color
d)
none of the above
34.
A line of volcanic activity that surrounds the Pacific Ocean basin is the
a)
Ring of Fire
b)
Aleutian Islands
c)
Hawaiian Islands
d)
Caribbean Islands
35.
What is a determining factor in which type of eruption will occur?
a)
the chemistry of the magma
b)
the size of the mountain
c)
the climate around the volcano
d)
the number of people living near the volcano
36.
As the temperature of lava increases, ________
a)
its viscosity decrease
b)
it begins to harden
c)
its viscosity increases
d)
it can flow a much short distance
37.
Stratovolcanoes can be described as...
a)
Very large with gentle slopes and eruptions of low viscosity magma
b)
Large with steep slopes and violent eruptions of very viscous magma
c)
Small and clustered in groups with steep slopes and firey eruptions that occur only once
38.
Cinder cones can be described as...
a)
Very large with gentle slopes and eruptions of low viscosity magma
b)
Large with steep slopes and violent eruptions of very viscous magma
c)
Small and clustered in groups with steep slopes and firey eruptions that occur only once
39.
What is pyroclastic material?
a)
Dust, ash and other material that comes out of a volcano.
b)
A type of magma that is in a volcano.
c)
A type of volcano.
40.
Which of the following is an opening through which molten rock and gas leave a volcano
a)
pipe
b)
magma chamber
c)
crater
d)
vent
41.
This is most likely a__________volcano because it has gradual sloping sides.
a)
composite
b)
shield
c)
cinder cone
42.
This is most likely a _______________ volcano because it is made up of only pyroclastic debris.
a)
shield
b)
cinder cone
c)
composite
43.
What kind of volcanoes are the most explosive?
a)
shield
b)
cinder cone
c)
stratavolcano
44.
What kind of lava rock forms under water?
a)
blocky lava
b)
pillow lava
c)
aa lava
45.
What kind of pyroclastic debris makes up small pebbles?
a)
Lapilli
b)
blocky lava
c)
ash
46.
Which kind of lava flows in ropey, smooth rivers?
a)
aa lava
b)
pahoehoe
c)
blocky
d)
pillow
47.
What causes eruptions to have a greater intensity explosion?
a)
High levels of Sulfuric acid
b)
Magma that contains high silica levels
c)
Methane gas combustion with lava
d)
Earthquake opens up the vents during plate shifting
48.
A shield volcano erupts nonexplosive eruptions of lava
a)
True
b)
False
49.
4. What kind of lava does a shield volcano make?
a)
Blocky Lava
b)
Runny lava
50.
5. What are the most explosive types of volcanoes?
a)
Shield
b)
Composite
c)
Cinder Cone
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