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NAME: _____________________ GRADE & SECTION: ___________
I. Multiple Choice: Read the statements carefully. Choose the BEST answer. Write the letter
of the correct answer on a sheet of paper.
1. What is a volcano?
A. The movement of the plate boundaries on the Earth’s crust.
B. A mountain created by the faulting and folding of the Earth’s crust.
C. An opening in the Earth’s crust through which lava, ash, and gases escape
onto the surface.
D. A landform which has a summit but without a crater.
2. What is a volcanic eruption?
A. It is a sudden violent shaking of the ground, causing great destruction.
B. It is an event that happens when hot lava, ash and gases are discharged from
a volcanic vent.
C. It happens when the plate edges of the Earth’s crust move downward or
sideways.
D. It is a region deep within the Earth’s mantle from which heat rises.
3. The following are factors affecting the viscosity of the magma, EXCEPT:
A. Amount of dissolved gases contained in magma
B. Chemical composition of magma
C. Size of the volcano’s crater
D. Temperature of magma
4. Identify factor that affects the viscosity of the magma as shown in the figure.
A. high silica content
B. low gas content
C. low temperature of magma
D. high temperature of magma
5. Which type of volcanoes have broad bases and steep sides, usually have
a large crater at the top and are formed by alternating layers of magma andash?
A. cinder cones
C. composite volcanoes
B. shield volcanoes
D. calderas
6. Taal Volcano in Batangas is an example of
.
A. cinder cone
B. composite volcano C. shield volcano
D. lava spire
7. Mt. Mayon is an example of a
volcano because
.
A. cinder cone, it is formed exclusively of pyroclastic materials
B. composite, it is composed of alternating layers of pyroclastic fragments
and solidified lava flows
C. shield, it is constructed of solidified lava flows
D. caldera, it was created when the summit was blown off by exploding gases
8. The picture on the right shows what type of volcanic eruption?
A. plinian
B. phreatic
C. strombolian
9. Which type of volcanic eruption is very explosive?
A. phreatic B. plinian
C. vulcanian
D. phreatomagmatic
D. strombolian
10. Mount Pinatubo erupted last April 2, 1991. What kind of volcanic eruption was it?
A. plinian B. phreatic
C. strombolian
D. vulcanian
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What’s In?
Activity 1. Volcano Crossword (20 minutes)
Complete this activity. Use the word bank below.
pyroclastic
summit
magma
slope
tephra
base
volcano
crater
cone
caldera
lava
gases
1
2
A
3
A
4
5
6
7
8
10
11
E
9
12
13
A
14
E
E
E
Across
2
6
Down
1
3
4
5
8
9
10
12
13
7
11
the lowest supporting layer of a volcano
opening in the earth’s crust from which lava, ash, and hot gases are ejected
during an eruption
passage way for magma flowing up during a volcanic eruption
rock fragments and gases erupted by a volcano
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a large volcanic crater, especially one formed by a major eruption
14
released by an erupting volcano in a form of water vapor
a term after a hot material erupts from a volcano and reaches the earth’s surface.
the sides or flanks of a volcano that radiate from the main or central vent
hill-shaped landform that forms around a volcano
highest point of a volcano
particles and fragments ejected by a volcanic eruption
molten materials beneath the earth’s crust
liquefied by heat
it is where magma is collected when the volcano is not yet going to erupt
mouth or opening of a volcano
Congratulations! You made it! The terms in the puzzle are very important because you will
encounter them in the next activities and discussions.
2
vent
chamber
Activity 3. They Affect Me A Lot!!!! (10 minutes)
Objective:
Identify the factors that affect the viscosity of magma.
Directions: Examine the illustrations below. Infer the factor that affects the viscosity of
magma as shown. Refer to the given choices inside the parenthesis. Write your answer on
the blank. (high temperature, low gas content, high silica content)
1.
2.
3.
1. What are the factors affecting the viscosity of magma?
,
,
Activity 4. Oh! What Volcano Am I? (30 minutes)
Objective:
Describe the different types of volcanoes according to the shape of their cone.
Directions: Underline the type of volcano on the first column. Then fill in the statements by
using the word bank below.
broad, warrior’s shield
steep, wide
almost, uniform
Shape of volcanic cone
Statements
It has
1.
(shield, composite, cinder)
It has
2.
slope and
crater.
sides.
(shield, composite, cinder)
3.
It is slightly
- structured
cone and looks like a
.
(shield, composite, cinder)
Question:
Which volcano do you think
a. is composed of alternating solidification of lava and pyroclastic deposits?
b. is formed from alternating ejected lava fragments and volcanic ash with wide crater?
c. is formed from non-viscous oozing lav
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Activity 5. Types of Volcanic Eruptions:(30 minutes)
Objective: Describe the types of volcanic eruptions.
Direction: Fill in the table below. Some example answers are given.
Pictures of Volcanic Eruption
Type of Volcanic
Eruption
1.
Brief Description
2.
Plinian
3.
4.
- a violent eruption due to the
contact between water and
new magma.
Phreatic
5.
6.
- characterized by tall
eruption columns that reach
up to 20 km high with
pyroclastic flow and ashfall
tephra
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Activity 7. Concept Mapping (30 minutes)
Accomplish the concept map by using the word bank to fill in the blank boxes.
magma composition
vulcanian
shield
temperature of magma
molten rock, ash, and gases escape onto the Earth’s surface
phreatomagmatic
composite
cinder cone
amount of gases in magma
phreatic
10
strombolian
plinian
both land and underwater
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Assessment: (Post-Test)
II. Multiple Choice: Read the statements carefully. Choose the BEST answer. Write the letter
of your answers on the space provided before each number.
1. What is a volcano?
A. An opening in the Earth’s crust through which lava, ash, and gases escape
onto the surface.
B. A landform which has a summit but without a crater.
C. A mountain created by the faulting and folding of the Earth’s crust.
D. The movement of the plate boundaries on the Earth’s crust.
2. What is a volcanic eruption?
A. It is an event that happens when hot lava, ash and gases are discharged from
a volcanic vent.
B. It happens when the plate edges of the Earth’s crust move downward or
sideways.
C. It is a region deep within the Earth’s mantle from which heat rises.
D. It is a sudden violent shaking of the ground, causing great destruction.
3. The following are factors affecting the viscosity of the magma EXCEPT
A.
B.
C.
D.
temperature of magma
size of the volcano’s crater
chemical composition of magma
amount of dissolved gases contained in the magma
4. Identify factor that affects the viscosity of the magma as shown in the figure.
A. high silica content
B. high temperature of magma
C. low gas content
D. low temperature of magma
5. Taal Volcano in Batangas is an example of
A. composite volcano
B. cinder cone
C. shield volcano
D. lava spire
6. Which type of volcanoes have broad bases and steep sides, usually have a
large crater at the top and are formed by alternating layers of magma andash?
A. calderas
B. composite
C. shield
D. cinder cones
7. Mt. Mayon is a
volcano because
.
A. cinder cone, it is formed exclusively of pyroclasts.
B. composite, it is composed of alternating layers of pyroclastic fragments
an d solidified lava flows
C. shield, it is constructed of solidified lava flows
D. caldera, it was created when the summit was blown off by exploding gases
8. The picture on the right shows what type of volcanic eruption?
A. plinian B. phreatic
C. strombolian
D. phreatomagmatic
9. Which type of volcanic eruption is very explosive?
A. vulcanian
B. plinian
C. phreatic
D. strombolian
10. Mount Pinatubo erupted last April 2, 1991. What kind of volcanic eruption was
it?
A. vulcanian B. phreatomagmatic C. strombolian D. plinian
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