EAPS 106 - HOMEWORK 1-3 | QUESTIONS AND
ANSWERS | WITH COMPLETE SOLUTION.
Which layer of the Earth is a liquid?
a. The crust
b. The mantle
c. The outer core
d. The inner core Answer - c. The outer core
How did the Earth form?
a. By accretion from the solar nebula
b. From material thrown out by a fast-spinning new Sun
c. From a collision between two giant planets
d. It is a rogue planet captured by the Sun Answer - a. By accretion from the
solar nebula
How did the Earth obtain the heat in its interior?
a. From radioactive decay
b. Residual heat from planetary accretion
c. Latent heat from core crystallization
d. All the above Answer - d. All the above
,What is planetary differentiation?
a. The process by which planets accrete material to grow.
b. The process by which the chemical elements of a planetary body accumulate
in different areas of that body.
c. The process by which the solar nebula was organized chemically such that
terrestrial planets formed near the Sun while giant planet formed further away.
d. The process by which continents and oceans separated themselves when our
planet first cooled. Answer - b. The process by which the chemical elements of
a planetary body accumulate in different areas of that body.
Which statement about plate tectonics is correct?
a. The Earth's lithosphere is comprised of a number of large tectonic plates
which have been slowly moving since about 3-4 billion years ago.
b. Where the plates meet, their relative motion determines the type of plate
boundary: convergent, divergent, or transform.
c. Tectonic plates are composed of the oceanic lithosphere and the thicker
continental lithosphere, each topped by its own kind of crust.
d. All the above Answer - d. All the above
Which statement about Earth's lithosphere is correct?
a. It includes only the crust, which constitutes the hard and rigid outer layer of
the Earth.
b. It includes only the uppermost mantle, which constitutes the hard and rigid
outer layer of the Earth just below the crust.
, c. It includes the crust and the uppermost mantle, which constitutes the weak
and pliable outer layer of the Earth.
d. It includes the crust and the uppermost mantle, which constitutes the hard
and rigid outer layer of the Earth. Answer - d. It includes the crust and the
uppermost mantle, which constitutes the hard and rigid outer layer of the
Earth.
What is asthenosphere?
a. It is the mechanically weak crust that enables the surface of the Earth to flow
like a fluid,
b. It is the mechanically weak uppermost mantle that lies just below the crust.
c. It is the mechanically weak layer of the upper mantle that lies just below the
lithosphere.
d. It includes the crust and the uppermost mantle, which constitutes the hard
and rigid outer layer of the Earth. Answer - c. It is the mechanically weak layer
of the upper mantle that lies just below the lithosphere.
What is the theory (or hypothesis) of continental drift? (Note: this question is
purely about continental drift, not plate tectonics.)
a. That over time the continents move relative to each other.
b. That ocean crust is created at mid-ocean ridges and destroyed at subduction
zones.
c. The entire outer shell of the Earth is divided into plates that move relative to
each other.
d. That topography on continents drifts up and down over time. Answer - a.
That over time the continents move relative to each other.
What is seafloor spreading?
ANSWERS | WITH COMPLETE SOLUTION.
Which layer of the Earth is a liquid?
a. The crust
b. The mantle
c. The outer core
d. The inner core Answer - c. The outer core
How did the Earth form?
a. By accretion from the solar nebula
b. From material thrown out by a fast-spinning new Sun
c. From a collision between two giant planets
d. It is a rogue planet captured by the Sun Answer - a. By accretion from the
solar nebula
How did the Earth obtain the heat in its interior?
a. From radioactive decay
b. Residual heat from planetary accretion
c. Latent heat from core crystallization
d. All the above Answer - d. All the above
,What is planetary differentiation?
a. The process by which planets accrete material to grow.
b. The process by which the chemical elements of a planetary body accumulate
in different areas of that body.
c. The process by which the solar nebula was organized chemically such that
terrestrial planets formed near the Sun while giant planet formed further away.
d. The process by which continents and oceans separated themselves when our
planet first cooled. Answer - b. The process by which the chemical elements of
a planetary body accumulate in different areas of that body.
Which statement about plate tectonics is correct?
a. The Earth's lithosphere is comprised of a number of large tectonic plates
which have been slowly moving since about 3-4 billion years ago.
b. Where the plates meet, their relative motion determines the type of plate
boundary: convergent, divergent, or transform.
c. Tectonic plates are composed of the oceanic lithosphere and the thicker
continental lithosphere, each topped by its own kind of crust.
d. All the above Answer - d. All the above
Which statement about Earth's lithosphere is correct?
a. It includes only the crust, which constitutes the hard and rigid outer layer of
the Earth.
b. It includes only the uppermost mantle, which constitutes the hard and rigid
outer layer of the Earth just below the crust.
, c. It includes the crust and the uppermost mantle, which constitutes the weak
and pliable outer layer of the Earth.
d. It includes the crust and the uppermost mantle, which constitutes the hard
and rigid outer layer of the Earth. Answer - d. It includes the crust and the
uppermost mantle, which constitutes the hard and rigid outer layer of the
Earth.
What is asthenosphere?
a. It is the mechanically weak crust that enables the surface of the Earth to flow
like a fluid,
b. It is the mechanically weak uppermost mantle that lies just below the crust.
c. It is the mechanically weak layer of the upper mantle that lies just below the
lithosphere.
d. It includes the crust and the uppermost mantle, which constitutes the hard
and rigid outer layer of the Earth. Answer - c. It is the mechanically weak layer
of the upper mantle that lies just below the lithosphere.
What is the theory (or hypothesis) of continental drift? (Note: this question is
purely about continental drift, not plate tectonics.)
a. That over time the continents move relative to each other.
b. That ocean crust is created at mid-ocean ridges and destroyed at subduction
zones.
c. The entire outer shell of the Earth is divided into plates that move relative to
each other.
d. That topography on continents drifts up and down over time. Answer - a.
That over time the continents move relative to each other.
What is seafloor spreading?
