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Volcano Review

Total questions: 35

Worksheet time: 23mins

Name
Class
Date
1.
This volcano is most likely which type of volcano?
a)
Felsic
b)
Composite
c)
Shield
d)
Cinder cone
2.
Once magma reaches the earth's surface it is called.....
a)
Silica
b)
Rock
c)
lava
3.
Volcanoes can be found...
a)

at divergent boundaries

b)

at convergent boundaries

c)

at hotspots

d)

all of the above

4.

Also known as Strato Volcanoes, this volcano is made from alternating layers of ash and lava is called a(n) _________________ volcano

a)

composite

b)

cinder cone

c)

shield

d)

fissure

5.
A volcano with a broad base and gently sloping sides is called a _________ volcano. 
a)
shield 
b)
cinder cone
c)
composite
d)
fissure
6.
Smaller volcanoes that typically throw ash into the air during eruption
a)
cinder cone
b)
shield
c)
composite
d)
fissure
7.

What type of volcano is this.. (small size)

a)

Shield

b)

Cinder Cone

c)

Composite or Stratovolcano

8.

Name the volcano type pictured (large size):

a)

cinder cone

b)

Composite/ stratovolcano

c)

shield volcano

d)

none of the above

9.
What type of volcano is Kilauea, which is located in Hawaii?
a)
Caldera
b)
Cinder Cone
c)
Composite Volcano
d)
Shield Volcano
10.
Where are most volcanoes found?
a)
Southern Hemisphere
b)
Ring of Fire
c)
Mid-Atlantic Ridge
d)
Hot Spots
11.
Most volcanoes occur at which 2 types of plate boundaries? 
a)
convergent w/ subduction and divergent
b)
divergent and transform
c)
divergent and hot spots
d)
convergent w/ subduction and hot spots
12.

what is the largest volcano?

a)

shield volcano

b)

cinder cone volcaano

c)

composite volcano

13.
This type of volcano has MOSTLY NONEXPLOSIVE eruptions
a)
composite
b)
cinder cone
c)
shield
14.

This type of volcano has the most EXPLOSIVE eruptions

a)

Shield

b)

Cinder Cone

c)

Composite

d)

Caldera

15.

Where are stratovolcanoes typically found?

a)

At divergent boundaries

b)

At convergent boundaries

c)

At hotspots

d)

All the above

16.
If a volcano's magma is high in silicia, the volcano will probably
a)
erupt quietly
b)
remain dormant
c)
erupt explosively
d)
produce dark color lava
17.
What provides the force that causes magma to erupt to the surface?
a)
the silica in the magma
b)
dissolved gases trapped in the magma
c)
gravity in the lithosphere
d)
the density of the magma
18.
When an explosive eruption  forms a mixture of hot rock, ash, and gas, this material is called a...?
a)
Land slide
b)
Lava
c)
Eruption trail
d)
Pyroclastic flow
19.
What is the principal ingredient to all types of magma?
a)
Iron
b)
Magnesium
c)
Silica
d)
Water
20.
Volcanoes that are NOT found at plate boundaries occur in the middle of plates in areas called ___________. 
a)
hot spots
b)
mid-ocean ridges
c)
fissure volcanoes
d)

trenches

21.
The composition of magma determines its _____.
a)
viscosity
b)
darkness
c)
color
d)
none of the above
22.
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
23.
TRUE OR FALSE:  A substance that flows quickly has high viscosity...
a)
True
b)
False
24.
What factor(s) determine(s) whether an eruption will be explosive?
a)
The amount of gases in the magma
b)
The amount of silica in the magma
c)
The amount of gas and silica in the magma
d)
None of these affect the explosiveness of the volcano
25.
Very explosive volcanoes tend to have
a)
Low viscosity magma
b)
Gases rich in sulfur dioxide
c)
gentle, sloping sides
d)
High viscosity magma
26.

Basaltic lava flows (think about Hawaii) are usually _________

a)
very fluid
b)
very viscous
27.

Gases escape more readily out of

a)

low-silica content (basaltic) magma

b)

high-silica content magma

28.

The degree to which a substance is resistance to flow is known as its:

a)

viscosity

b)

volatiles

c)

eruption columns

d)

aa flows

e)

pyroclastic materials

29.

Particles of ejected lava produced from volcanic eruptions that range in size from ash and dust to much larger blocks and bombs are called:

a)

viscosity

b)

volatiles

c)

eruption columns

d)

aa flows

e)

pyroclastic materials

30.

Which of the following is not a factor that determines how violently a volcano will erupt?

a)

magma temperature

b)

magma composition

c)

magma dissolved gas amount

d)

magma color

31.

In general, the more silica in magma, the ______________ its viscosity.

a)

lower

b)

greater

32.

All eruptions are spectacular and explosively violent.

a)

True

b)

False

33.

Why is the temperature so high at hotspots

a)

There is hot lava there

b)

Compared to the ocean water it is really hot

c)

They form near the equator

d)

The magma is being heated from deep within Earth

34.

Why is the lava from stratovolcano/composite volcanoes so "cool"?

a)

The subducted crust is just barely melting

b)

The oceanic crust is cooler than continental crust

c)

Continental crust is cooler than oceanic crust

d)

The ocean water cools it down

35.

Why do stratovolcanoes have so much more trapped gas compared to shield volcanoes?

a)

basalt has little silica in it

b)

the magma less viscous

c)

ocean water is pulled in at the subduction zone and turns to gas as it heats up

d)

Hotspots are too hot for gas to form

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