Read each item carefully. Write only the letter of the correct answer
for each question. Use a separate sheer for your answers.
1. Which correctly describes crust?
A. The deepest layer of the earth.
B. The thinnest layer of the earth.
C. It makes up 70% of the Earth’s mass.
D. Contains the ocean floor and the continents.
2. What happens when the material in the asthenosphere is cooled?
A. It becomes less dense and sink C. It becomes more dense and sink
B. It becomes less dense and rises D. It becomes more dense and rises
3. Which of the following statements differentiates continental crust from oceanic crust?
A. The oceanic crust is thicker than the continental crust.
B. Seismic waves travel faster in continental crust than in oceanic crust.
C. Continental crust and oceanic crust are made up of different materials.
D. The continental crust supports the continental plates while oceanic crust supports
the ocean floors
4. Which of the following is responsible for the Earth’s magnetic field?
A. The circulation of the outer core causes the magnetic field around the earth.
B. The circulation of the inner core causes the magnetic field around the earth.
C. The tremendous pressure given by the weight of the Earth prevents the inner core
from melting.
D. The tremendous pressure given by the weight of the Earth prevents the outer core
from melting.
5. How do geologists know the composition of the earth’s interior?
A. Geologists have been able to learn about the different layers by studying rocks
and minerals only.
B. Geologists have been able to learn about the different layers by studying rocks,
minerals, and volcanoes.
C. Geologists have been able to learn about the different layers by studying rocks
and minerals, volcanoes, and earthquakes.
D. Geologists have been able to learn about the different layers by studying rocks
and minerals, volcanoes, earthquakes and plate movements.
6. Why it is not possible to dig our way through the ground to the other side of the Earth?
A. Because people invented the most durable metal which can surpass the intense
heat from the core.
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B. Because of the extreme temperature and pressure as you go deeper beneath the
earth.
C. Because of the less temperature and pressure as you go deeper beneath the earth.
D. Because no one can survive the intense heat as you go deeper beneath the earth.
7. How are layers of the Earth different from one another?
I. The Earth’s layers differ in thickness.
II. The Earth’s layers differs in composition.
III. The Earth’s layers differs in temperature, pressure and density.
IV. The Earth’s layers differ in color, height, mass, content and intensity.
A. I, II, III B. I, II, IV C. II, III, IV D. I, III, IV
8. How is temperature and density related to the increase of depth of the earth’s layer?
A. The temperature and density increase as depth increases.
B. The temperature and density increase as depth decreases.
C. The temperature and density decrease as depth increases.
D. The temperature and density decrease as depth decreases
9. The average density of the planet is 5.5 g/cm3
, while the surface is only 3.0 g/cm3
. What
is the best explanation of this statement?
A. The surface of the Earth is denser than the core.
B. The surface of the Earth is less dense than the core.
C. The interior of the Earth is denser than the rest of the planet.
D. The interior of the Earth is less dense than the rest of the planet.
10. Based on the diagram below, which correctly describes the location of the mantle?

A. The mantle is above the earth’s crust.
B. The mantle is between the crust and the core.
C. The mantle is between the crust and inner core.
D. The mantle is between the outer core and the inner core.