QUIZ ON MAGMATISM
Directions: Choose the letter of the correct
answer.
1. What drives the Earth’s internal heat
engine?
A. oceanic tides
C. solar energy
B. radioactivity
D. volcanoes
2. The temperature of the Earth _____ as the
depth _____towards the
core.
A. decreases, decreases
B. decreases, increases
C. increases, decreases
D. increases, increases
3. The process of growth through gradual
accumulation of layers is
called _____.
A. acceleration
C. creation
B. accretion
D. formation
4. All are sources of Earth’s internal heat
EXCEPT ________.
A. endogenic heating
B. frictional
heating
C. heat from formation and accretion D.
radioactivity
5. The core is ________.
A. blue in color
C. very cool
B. made of rock
D. very hot
6. Which of the following magmas has the
highest viscosity?
A. Andesitic
C. Intermediate
B. Felsic
D. Mafic
7. Which of the following magmas has the
lowest viscosity?
A. Andesitic
C. Intermediate
B. Felsic
D. Mafic
8. What is magma?
A. Bubbles of gas
B. Carbonic acid in crevices of rocks
C. Molten rock
D. Salt crystals
9. How is magma formed at subduction zone?
A. Frictional heating
B. Increased in pressure leads to melting at
the subducting plates
C. Increased in temperature that leads to
melting at the subducting plate
D. Water released from the subducting plate
lowers the meltingpoint of the overlying
mantle
10. Magma with low temperature has
__________viscosity.
A. equal
C. lower
B. higher
D. no effect
11. Based on your learnings what is magma?
A. composed of semi-liquid hot molten rocks
located beneath the Earth, specifically in the
melted mantle rock and oceanic plate
B. composed of semi- solid rocks located
beneath the Earth, specifically in the melted
mantle rock and oceanic plate
C. composed of semi-liquid hot molten rocks
located beneath the Earth, specifically in the
core
D. composed of semi- solid rocks located
beneath the Earth, specifically in the core
12. Where does the formation and movement
of magma take place?
A. These happen in the lower part of the
Earth’s crust, known as asthenosphere
B. These happen in the upper portion of the
mantle, known as asthenosphere
C. These happen in the lower part of the
Earth’s crust and in the mantle, known as
asthenosphere
D. These happen in the lower part of the
Earth’s crust and in the upper portion of the
mantle, known as asthenosphere
13. After the magma is formed, it tried to go
up in the area with lower pressure, comes out
of the volcano as lava and solidifies on the
Earth’s surface. Which of the following
processes happened to the magma?
A. Magmatism B. Metamorphism
c. Plutonism
D. Volcanism
II. True or False. Write T if the statement is
expressing correct idea and F if the statement
is wrong. Write your answer in your notebook.
______ 1. Frictional heating is considered as
the highest source of Earth’s internal heat.
______ 2. The process of growth through
gradual accumulation of layers is called
formation.
______ 3. Oceanic tides drive the Earth’s
internal heat.
______ 4. The temperature of the Earth
increase as the depth increases away from the
core.
______ 5. Endogenic processes is associated
with energy coming from the interior of the
Earth. ______
6. One of the Laws of Thermodynamics states
that heat flow from hot to cold.
______ 7. In the Earth’s history, formation of
moon happened after the bombardment of
asteroid.
______ 8. Radioactive elements are
considered as the least contributor of heat.
______ 9. The geothermal gradient of Earth is
about 15° to 30°C per km within the mantle.
______10. The estimated temperature of the
core is about 6000°C.
______11. Aluminum is the most abundant
element present in magma.
______12. Magma rises toward Earth’s
surface because it is less dense than the
surrounding rocks.
______13. Andesitic is more viscous than
felsic magma.
______14. Decompression melting involved
temperature reduction.
______15. Temperature is considered as the
most important factor in the formation of
magma.
III. Filling the blanks. Supply the missing word
or words that will complete the sentence.
1. Process of melting that is triggered by a
reduction in pressure is called
_________________________
2. Magma with high viscosity tend to erupt
_______________________.
3.Impurities introduced to magma cause the
rock to melt at__________ temperature.
4. ___________is a molten mixture of rockforming substances, gases, and water from the
mantle.
5. Viscosity is defined as the resistance of fluid
to flow and depends primarily on the
composition and___________________ of the
magma.
IV. ENUMERATION
1. 3 TYPES OF MAGMA
2. 3 WAYS TO GENERATE MAGMA
3. 3 TYPES OF HEAT TRANSFER