WorksheetsVolcanoes
Total questions: 20
Worksheet time: 12mins
Name
Class
Date
1.
What is molten rock that has formed deep within the Earth?
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.
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
4.
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
5.
Vocanoes are found...
a)
on land
b)
under water
c)
on islands
d)
all of the above
6.
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)
7.
Volcanoes that have recently erupted are known as:
a)
Extinct Volcano
b)
Dormant Volcano
c)
Active Volcano
d)
What's a volcano?
8.
__________ volcanoes are usually steep sided. They are formed from layers of ash and lava.
a)
Shield
b)
Cone
c)
Dormant
d)
Extinct
9.
__________ volcanoes are formed from fast flowing, lava which flows easily over the surface, forming larger volcanoes with gentle sides.
a)
Cone
b)
Composite
c)
Angel
d)
Shield
10.
A subduction zone is...
a)
plates pull apart.
b)
the continental plate slides under the oceanic plate.
c)
where the oceanic plate slides under the continental plate.
d)
plates slap each other a high five.
11.
Lava that is very thin and runny probably
a)
has low silica content
b)
is high in silica
12.
Where are volcanoes most likely to form?
a)
along plate boundaries
b)
near the center of continents
c)
near water
d)
on the moon
13.
One major belt of volcanoes that surrounds the Pacific Ocean
a)
Ring of Fire
b)
Ring of Asia
c)
Ring o' earthquakes
d)
Ring a ding ding
14.
A bowl shaped area that may form at the top of a volcano around the central vent
a)
crater
b)
vent
c)
tube
d)
leftovers
15.
Lakes that form near volcanoes considered to be....
a)
Craters
b)
Conduits
c)
Vents
d)
Calderas
16.
What is letter B in the picture?
a)
Magma Chamber
b)
Crater
c)
Vent
d)
Conduit
17.
What is letter C in the picture?
a)
Vent
b)
Crater
c)
Caldera
d)
Tephra
18.
What is letter D in the picture?
a)
Crater
b)
Vent
c)
Conduit
d)
Tephra
19.
What is letter E in the picture?
a)
Tephra
b)
Pyroclastic Flow
c)
Magma Chamber
d)
Vent
20.
What is letter F in the picture?
a)
Pyroclastic Flow
b)
Crater
c)
Vent
d)
Tephra
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