
Volcanoes Review 2023
Presentation
•
Science
•
6th - 8th Grade
•
Practice Problem
•
Easy
Standards-aligned
Cindy Mott
Used 18+ times
FREE Resource
6 Slides • 15 Questions
1
Volcano
(a weak spot in the Earth’s crust where magma comes to the
surface)
Review: Volcanoes
forms along
Subduction Zones
(where dense crust slide under less dense crust creating
magma that rises up to the surface)
Forms along convergent ( ) , divergent ( ), and hotspot boundaries
Magma - melted rock underground / Lava - melted rock that flows on the surface
2
3
4
Multiple Choice
Most Earthquakes and Volcanoes can be found....
along the coast of Anarctica
along plate boundaries
in the united States
5
Multiple Choice
This is the name for the chain of volcanoes and earthquakes around the edge of the Pacific Plate.
The Subduction Zone
The Ring of Fire
The Seismic-Tectonic Area
6
Multiple Choice
divergent
convergent
transform
7
Multiple Choice
divergent
convergent
transform
8
Multiple Choice
divergent
convergent
transform
9
Multiple Choice
The area where the ocean plate slides underneath the land plate, forming magma (and possibly a volcano) is called the ____.
moho
subduction zone
epicenter
10
Multiple Choice
Hot melted rock that forms underground near the subduction zone is called ___.
lava
sedimentary rock
igneous rock
magma
11
Multiple Choice
What is magma called when it reaches the surface of Earth?
Lava
viscosity
toxic gas
12
Review: Volcanoes
Parts of A Volcano
vent
Magma
chamber
pipe
Quiet
-Thin basaltic magma/lava (flows
easily and does not clog up the pipe
and vent)
-Low in silica
Types of Eruptions
Explosive
-Thick granitic magma/lava (flows
slowly and clogs up the pipe and
vent - builds pressure)
-High in silica
13
Multiple Choice
How much ___ that is in a volcano's magma helps to decide whether it will be explosive or quiet.
silica
rock
air holes
soil
14
Match
Thick, granitic magma makes
Thin, basaltic magma makes
Volcano type that tends to erupt quietly
Volcano type that tends to erupt loudly
explosive eruptions
quiet eruptions
shield
composite
explosive eruptions
quiet eruptions
shield
composite
15
Multiple Choice
True or False: The more silica a volcano has in its magma, the quieter it will erupt.
true
false
16
3 Main Types of Volcanoes
Shield
-Non explosive
-Made mostly of thin,
basaltic lava flows
-Large, island forming (Ex.
The Hawaiian Islands)
Composite
-Most common type on Earth
-Has the classic cone shape
-Very explosive - made mostly
of thick, granitic lava flows
-Has alternating layers of lava
flow and pyroclastic material
CInder Cone
-Tend to be smaller
-Can be composite or shield
-Tall, steep sides
-Lava is slightly thicker than the
shield (can explode out cinders)
17
3 Main Types of Volcanoes
Shield
-Non explosive
-Made mostly of basaltic lava
flows
-Large, island forming (Ex.
The Hawaiian Islands)
Composite
-Most common type on Earth
-Has the classic cone shape
-Very explosive
-Has alternating layers of lava
flow and pyroclastic material
CInder Cone
-Tend to be smaller
-Can be composite or shield
-Tall, steep sides
-Lava is slightly thicker than the
shield (can explode out cinders)
18
Match
Match the volcano to its descriptions?
Erupt quietly - has dark basaltic magma
Has tall steep sides
Erupt loudly - has light grinitic magma
Shield
Cinder Cone
Composite
Shield
Cinder Cone
Composite
19
Match
Match the volcano to its descriptions?
Is broader and wider than it is tall
Magma/lava is thinner than composite but thicker than shield
Most common type of volcano in the world
Shield
Cinder Cone
Composite
Shield
Cinder Cone
Composite
20
Match
Match the volcano to its descriptions?
Forms islands like Hawaii
Throws out chunks of flaming debris called cinders.
Most explosive type
Shield
Cinder Cone
Composite
Shield
Cinder Cone
Composite
21
Match
Match the volcano to its descriptions?
Shield
Cinder Cone
Composite
Shield
Cinder Cone
Composite
Volcano
(a weak spot in the Earth’s crust where magma comes to the
surface)
Review: Volcanoes
forms along
Subduction Zones
(where dense crust slide under less dense crust creating
magma that rises up to the surface)
Forms along convergent ( ) , divergent ( ), and hotspot boundaries
Magma - melted rock underground / Lava - melted rock that flows on the surface
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