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Yr 9 Volcanoes

Total questions: 40

Worksheet time: 40mins

Name
Class
Date
1.
Which one of these does NOT affect the temperature at which magma forms?
a)
Pressure
b)
Composition of material
c)
Water
d)
Viscosity
2.
What is letter B in the picture?
a)
Magma Chamber
b)
Crater
c)
Vent
d)
Conduit
3.
What is letter C in the picture?
a)
Vent
b)
Crater
c)
Caldera
d)
Tephra
4.
Where can you find a rift or divergent area of volcanism?
a)
Mid-Atlantic Ridge
b)
Pacific Ocean
5.

Which theory helped scientists understand how and where volcanoes erupt?

a)

Theory of Plate Tectonics

b)

Theory or Relativity

c)

Theory of the Rock Cycle

d)

Big Bang Theory

6.

Which type of volcano is built by alternating layers of lava flows and ash flows? It can

be very explosive.

a)

Cinder Cone

b)

Composite

c)

Lava Dome

d)

Shield

7.

Which type of volcano if found in the Hawaiian Islands with thick flowing, slow moving lava? This is the most common type of volcano on earth.

a)

Cinder Cone

b)

Composite

c)

Lava Dome

d)

Shield

8.

Which type of volcano is currently resting, but could erupt sometime in the future?

a)

Active

b)

Dormant

c)

Extinct

d)

All of the above

9.

The weak point in the Earth’s crust where hot magma rises and reaches the earth’s

surface is call the __________.

a)

Crater

b)

Magma Chamber

c)

Main Vent

d)

Secondary Cone

10.

An active volcanic area on earth is found at_______.

a)

Diverging Boundaries

b)

Converging Boundaries

c)

Hot Spots

d)

All of the above

11.

What is the active volcano area around the Pacific Rim called?

a)

Hot Spots

b)

Pacific Ocean

c)

Ring of Fire

d)

Hawaii

12.

Magma is found above the earth surface?

a)

True

b)

False

13.
What type of volcano is Kilauea, which is located in Hawaii?
a)
Caldera
b)
Cinder Cone
c)
Composite Volcano
d)
Shield Volcano
14.
Where are most volcanoes found?
a)
Southern Hemisphere
b)
Ring of Fire
c)
Mid-Atlantic Ridge
d)
Hot Spots
15.
What is molten rock that has reached the Earth's surface?
a)
Aa
b)
Lava
c)
Magma
d)
Pahoehoe
16.
Where do volcanoes come from?
a)
Places where plates move apart
b)
Places where plates are moving together
c)
Hot Spots
d)
All of these options
17.
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
18.
Vocanoes are found...
a)
on land
b)
under water
c)
on islands
d)
all of the above
19.
What is a volcano?
a)
A mountain that has lava all over it 
b)
A giant hill filled with magma
c)
A long high sea wave 
d)
A hole in the Earth where magma erupts
20.
The volcanoes on the Hawaiian Islands form due to which of the following?
a)
Divergent Boundary
b)
Hot Spot
c)
Subduction Boundary
d)
Transform Boundary
21.
The composition of magma determines its _____.
a)
viscosity
b)
darkness
c)
color
d)
none of the above
22.
This volcano is most likely which type of volcano?
a)
Felsic
b)
Composite
c)
Shield
d)
Cinder cone
23.
Which of the following factors helps determine whether a volcanic eruption will be violent or relatively quiet?
a)
amt of dissolved gases
b)
temp of magma
c)
composition of magma
d)
all of the above
24.
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
25.
Highly explosive volcanoes tend to have what type of magma?
a)
magma with high silica, high viscosity, and higher gas content
b)
magma with low silica, low viscosity, and lower gas content
c)
magma with low silica, high viscosity, and lower gas content
d)
magma with no silica, high viscosity, and no gas content
26.
Tall, cone-shaped mountains in which layers of lava alternate with layers of ash are called
a)
shield volcanoes
b)
cinder cone volcanoes
c)
composite volcanoes
d)
lava plateaus
27.
Which volcano is a wide, gently sloping mountains made of layers of lava and is formed by quiet eruptions?
a)
Composite
b)
Cinder-Cone
c)
Shield
d)
Stratovolcano
28.
What is the term for a fluid's tendency to resist flow?
a)
Movement
b)
Silica
c)
Pressure
d)
Viscosity
29.
TRUE OR FALSE:  A substance that flows quickly has high viscosity...
a)
True
b)
False
30.
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
31.

Which type of volcano has low silica content?

a)

Shield

b)

Cinder cone

c)

Composite/stratovolcano

32.

Which type of volcano is the most explosive?

a)

Shield

b)

Cinder cone

c)

Composite/Stratovolcano

33.

How much of the world's volcanoes are located around the Ring of Fire?

a)

25%

b)

50%

c)

75%

d)

95%

34.

Which type of volcano is Mount St. Helen's in Washington state?

a)

Shield

b)

Cinder cone

c)

Composite/stratovolcano

35.

Which type of volcano is Mount Fuji in Japan?

a)

Shield

b)

Cinder cone

c)

Composite/stratovolcano

36.
The more silica that magma contains...
a)
the thicker the magma
b)
the thinner the magma
c)
the higher the viscosity
d)
the runnier the magma
37.
Shield volcanoes have:
a)
gently sloping sides
b)
a steep cone shape
c)
moderately sized sides
d)
long cracks along plate boundaries
38.
Explosive eruption that hurls ash, gases, cinders, and bombs from the main vent.
a)
Volcano bomb
b)
Geyser
c)
Geothermal energy
d)
Pyroclastic flow
39.
A chain of volcanic islands formed where two oceanic plates collide is called:
a)
island arc
b)
hot spot
c)
Hawaii
d)
geyser
40.
Magma's resistance to flow, or how thick it is, is called:
a)
silica
b)
viscosity
c)
hot spot
d)
caldera

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