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WorksheetsVolcanoes
Total questions: 20
Worksheet time: 40mins
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)
Mantle
b)
Lava
c)
Magma
d)
Ash
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.
Where is the largest volcano?
a)
Africa
b)
Indonesia
c)
Wyoming
d)
Hawaii
7.
Where are most volcanoes found?
a)
Southern Hemisphere
b)
Ring of Fire
c)
Mid-Atlantic Ridge
d)
Hot Spots
8.
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
9.
Volcanoes that have recently erupted are known as:
a)
Extinct Volcano
b)
Dormant Volcano
c)
Active Volcano
d)
What's a volcano?
10.
A volcano that has erupted in the last 2000 years but not recently is known as....
a)
Dormant
b)
Active
c)
Extinct
d)
Angry
11.
Volcanoes that have not erupted for at least 10,000 years are described as...
a)
Sleeping
b)
Dormant
c)
Active
d)
Extinct
12.
__________ volcanoes are usually steep sided. They are formed from layers of ash and lava.
a)
Shield
b)
Cone
c)
Dormant
d)
Extinct
13.
What is letter B in the picture?
a)
Magma Chamber
b)
Crater
c)
Vent
d)
Conduit
14.
What is letter C in the picture?
a)
Vent
b)
Crater
c)
Caldera
d)
Tephra
15.
What is letter D in the picture?
a)
Crater
b)
Vent
c)
Conduit
d)
Tephra
16.
What is letter F in the picture?
a)
Pyroclastic Flow
b)
Crater
c)
Vent
d)
Tephra
17.
A 'pyroclastic flow' may consist of...(more than one choice)
a)
gases
b)
ash
c)
lava
d)
lava blocks
e)
pumice
18.
The weak point or pipe 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
19.
The belt of volcanoes around the rim of the Pacific Ocean is called:
a)
Island arc
b)
Ring of Fire
c)
Lava plateau
d)
Hawaii
20.
When a volcano erupts, empties the magma chamber, and collapses the top leaving a huge hole.
a)
Dike
b)
Caldera
c)
Silica
d)
Geyser
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