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Earth Science
6th Grade:
Vocabulary: Volcanoes
Name: _________________________
Directions: Select from the numbered definitions or descriptions the
best answer for each of the given terms. Put the number in the proper
space in the magic square box. The sum of the numbers will be the
same horizontally, vertically, and diagonally.
Magic Number: ________
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Terms:
A. Volcano
B. Lava
C. Ring of Fire
D. Island Arc
E. Hot Spot
F. Magma Chamber
G. Pipe
H. Vent
I. Lava Flow
J. Crater
K. Viscosity
L. Silica
M. Pyroclastic Flow
N. Dormant
O. Extinct
P. Shield Volcano
Q. Cinder Cone
R. Composite Volcano
S. Caldera
T. Volcanic Neck
U. Dike
V. Sill
W. Batholith
X. Geothermal Activity
Y. Geyser
Definitions or Descriptions:
1. A volcano that is no longer active and is unlikely to erupt again.
2. A wide, gently sloping mountain made of layers of lava and formed by quiet
eruptions.
3. A slab of volcanic rock formed when magma squeezes between layers of rock.
4. A major belt of volcanoes that rims the Pacific Ocean.
5. The area covered by lava as it pours out of a volcano’s vent.
6. The opening through which molten rock and gas leave a volcano.
7. A volcano that is not currently active, but that may become active in the future.
8. A deposit of hardened magma in a volcano’s pipe.
9. A slab of volcanic rock formed when magma forces itself across rock layers.
10. Liquid magma that reaches the surface; also, the rock formed when liquid lava
hardens.
11. A weak spot in the crust where magma has come to the surface.
12. A long tube through which magma moves from the magma chamber to Earth’s
surface.
13. The expulsion of ash, cinders, bombs, and gases during an explosive volcanic
eruption.
14. The large hole at the top of a volcano formed when the roof of a volcano’s
magma chamber collapses.
15. A fountain of water and steam that builds up pressure underground and erupts
at regular intervals.
16. The heating of underground water by magma.
17. An area where magma from deep within the mantle melts through the crust
above it.
18. The pocket beneath a volcano where magma collects.
19. A material found in magma that is formed from the elements oxygen and silicon.
20. A tall, cone-shaped mountain in which layers of lava alternate with layers of ash
and other volcanic materials.
21. A steep, cone-shaped hill or small mountain made of volcanic ash, cinders, and
bombs piled up around a volcano’s opening.
22. A mass of rock formed when a large body of magma cools inside the crust.
23. A string of islands formed by the volcanoes along a deep-ocean trench.
24. A bowl-shaped area that forms around a volcano’s central opening; a large
round pit caused by the impact of a meteoroid.
25. A liquid’s resistance to flowing.