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Chapter 7 Review - Volcanoes

Total questions: 19

Worksheet time: 19mins

Name
Class
Date
1.

What is molten rock that has formed below the Earth's surface?

a)

Hot Spot

b)

Magma

c)

Lava

d)

Volcano

2.
What is molten rock that has reached the Earth's surface?
a)
Aa
b)
Lava
c)
Magma
d)
Pahoehoe
3.
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
4.
Vocanoes are found...
a)
on land
b)
under water
c)
on islands
d)
all of the above
5.
The difference between magma and lava is _____
a)
where it is found (above or below the surface)
b)
how hot the molten rock is (lava is hotter than magma)
c)
 the type of boundary where it forms
d)
the viscosity of the molten rock (lava has a lower viscosity)
6.
What is / are sign(s) that a volcano may erupt soon?
a)
Earthquake activity in the area
b)
Changes in the shape of the volcano
c)
Different amounts of gas being produced
d)
All of these are signs
7.
A volcano that has gentle sloping sides and is formed from runny lava
a)
Shield volcano
b)
Cinder cone
c)
Composite
d)
None of these
8.

When an explosive eruption forms a mixture of hot gas, ash, cinders, and bombs, this material is called a...?

a)

Land slide

b)

Lava

c)

Eruption trail

d)

Pyroclastic flow

9.
This is the name for the chain of volcanos around the edge of the Pacific Plate.
a)
Circle of Fire
b)
Ring of Lava
c)
Ring of Fire
d)
Circle of Magma
10.
A volcano that has steep sides and is formed from lava chunks is called
a)
a shield volcano
b)
a cinder cone volcano
c)
a composite volcano
11.
Dormant volcanoes might erupt in the future.
a)
True
b)
False
12.
A weak spot in the crust where molten material, or magma comes to the surface
a)
lava
b)
volcano
c)
earthquake
d)
tsunami
13.
Tall, cone-shaped mountains in which layers of lava alternate with layers of ash
a)
Cinder Cone volcano
b)
Shield volcano
c)
Composite volcano
d)
Caldera
14.
What type of volcano is Mt. St. Helens?
a)
shield
b)
composite
c)
cinder cone
d)
active
15.

Instead of forming mountains, some eruptions of lava form high, level areas called

a)

cinder cones.

b)

calderas.

c)

lava plateaus.

d)

vents.

16.

A large hole left by the collapse of a volcanic mountain is called a

a)

caldera.

b)

sill.

c)

batholith.

d)

lava plateau.

17.

The volcanoes that make up the Ring of Fire around the Pacific Ocean were formed by

a)

subducting plates.

b)

diverging plate boundaries.

c)

many hot spots.

d)

collisions of continental plates.

18.

Lava will harden into rough, jagged chunks of rock if it is formed by magma that is

a)

fast moving.

b)

thin and runny.

c)

high in silica.

d)

low in silica.

19.

What term is used to describe how well liquids flow?

a)

temperature

b)

silica

c)

viscosity

d)

pressure

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