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Earth’s Structure and Composition Online MCQs with Answers
Which layer of the Earth is composed mostly of solid iron and nickel?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the rigid outermost layer of the Earth?
a) Crust
b) Mantle
c) Lithosphere
d) Asthenosphere
Which layer of the Earth is characterized by a semi-solid, plastic-like consistency?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the layer between the crust and the core of the Earth?
a) Lithosphere
b) Asthenosphere
c) Mesosphere
d) Outer core
Which layer of the Earth is composed mostly of molten iron and nickel?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the rigid, outer part of the mantle that includes the crust?
a) Lithosphere
b) Asthenosphere
c) Mesosphere
d) Outer core
Which layer of the Earth is responsible for generating Earth’s magnetic field?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the boundary between the Earth’s crust and mantle?
a) Moho
b) Gutenberg discontinuity
c) Lehmann discontinuity
d) Conrad discontinuity
Which layer of the Earth is the thinnest?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the solid, central part of the Earth’s core?
a) Inner core
b) Outer core
c) Mesosphere
d) Asthenosphere
Which layer of the Earth is the thickest?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the boundary between the mantle and the core of the Earth?
a) Moho
b) Gutenberg discontinuity
c) Lehmann discontinuity
d) Conrad discontinuity
Which layer of the Earth is composed mainly of silicon, oxygen, aluminum, and iron?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the layer of the Earth’s mantle just below the lithosphere?
a) Asthenosphere
b) Mesosphere
c) Outer core
d) Inner core
Which layer of the Earth is composed mostly of solid rock?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the boundary between the outer core and the inner core of the Earth?
a) Moho
b) Gutenberg discontinuity
c) Lehmann discontinuity
d) Conrad discontinuity
Which layer of the Earth is responsible for generating convection currents?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the boundary between the crust and the mantle that marks a change in seismic wave velocity?
a) Moho
b) Gutenberg discontinuity
c) Lehmann discontinuity
d) Conrad discontinuity
Which layer of the Earth is the densest?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the layer of the Earth’s mantle just above the outer core?
a) Asthenosphere
b) Mesosphere
c) Lithosphere
d) Inner core
Which layer of the Earth is composed mainly of iron, nickel, and small amounts of other elements?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the process by which different materials in the Earth separate based on density?
a) Differentiation
b) Convection
c) Plate tectonics
d) Subduction
Which layer of the Earth is responsible for the movement of tectonic plates?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the measure of the average density of a substance compared to the density of water?
a) Specific gravity
b) Atomic mass
c) Viscosity
d) Mohs hardness
Which layer of the Earth is composed mostly of solid rock, including granite and basalt?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the scale used to measure the hardness of minerals?
a) Richter scale
b) Mohs scale
c) Kelvin scale
d) Beaufort scale
Which layer of the Earth contains the majority of Earth’s mass?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the measure of a mineral’s resistance to scratching?
a) Specific gravity
b) Atomic mass
c) Viscosity
d) Mohs hardness
Which layer of the Earth is composed mainly of iron, magnesium, silicon, and oxygen?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the measure of a fluid’s resistance to flow?
a) Specific gravity
b) Atomic mass
c) Viscosity
d) Mohs hardness
Which layer of the Earth is the thickest?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the measure of the mass of an atom?
a) Specific gravity
b) Atomic mass
c) Viscosity
d) Mohs hardness
Which layer of the Earth is the least dense?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the solid rock layer beneath the soil and loose sediment on the Earth’s surface?
a) Lithosphere
b) Asthenosphere
c) Mesosphere
d) Crust
Which layer of the Earth is responsible for the formation of magma?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the measure of the Earth’s magnetic field?
a) Magnetic declination
b) Magnetic inclination
c) Magnetic permeability
d) Magnetic field strength
Which layer of the Earth is composed mainly of solid iron and nickel?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the measure of the change in the Earth’s magnetic field with respect to location?
a) Magnetic declination
b) Magnetic inclination
c) Magnetic permeability
d) Magnetic field strength
Which layer of the Earth is responsible for the formation of the Earth’s magnetic field?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the measure of the tilt of the Earth’s magnetic field with respect to the horizontal plane?
a) Magnetic declination
b) Magnetic inclination
c) Magnetic permeability
d) Magnetic field strength
Which layer of the Earth is responsible for the formation of the Earth’s magnetic field?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the measure of the Earth’s magnetic field?
a) Magnetic declination
b) Magnetic inclination
c) Magnetic permeability
d) Magnetic field strength
Which layer of the Earth is composed mainly of solid iron and nickel?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the measure of the change in the Earth’s magnetic field with respect to location?
a) Magnetic declination
b) Magnetic inclination
c) Magnetic permeability
d) Magnetic field strength
Which layer of the Earth is responsible for the formation of the Earth’s magnetic field?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the measure of the tilt of the Earth’s magnetic field with respect to the horizontal plane?
a) Magnetic declination
b) Magnetic inclination
c) Magnetic permeability
d) Magnetic field strength
Which layer of the Earth is composed mainly of solid iron and nickel?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the measure of the Earth’s magnetic field?
a) Magnetic declination
b) Magnetic inclination
c) Magnetic permeability
d) Magnetic field strength
Which layer of the Earth is composed mostly of molten iron and nickel?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the boundary between the Earth’s crust and mantle?
a) Moho
b) Gutenberg discontinuity
c) Lehmann discontinuity
d) Conrad discontinuity
Which layer of the Earth is characterized by a semi-solid, plastic-like consistency?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the layer between the crust and the core of the Earth?
a) Lithosphere
b) Asthenosphere
c) Mesosphere
d) Outer core
Which layer of the Earth is composed mostly of molten iron and nickel?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the rigid, outer part of the mantle that includes the crust?
a) Lithosphere
b) Asthenosphere
c) Mesosphere
d) Outer core
Which layer of the Earth is responsible for generating Earth’s magnetic field?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the boundary between the crust and the mantle that marks a change in seismic wave velocity?
a) Moho
b) Gutenberg discontinuity
c) Lehmann discontinuity
d) Conrad discontinuity
Which layer of the Earth is composed mainly of silicon, oxygen, aluminum, and iron?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the layer of the Earth’s mantle just below the lithosphere?
a) Asthenosphere
b) Mesosphere
c) Outer core
d) Inner core
Which layer of the Earth is composed mostly of solid rock?
a) Crust
b) Mantle
c) Outer core
d) Inner core
What is the term for the measure of the average density of a substance compared to the density of water?
a) Specific gravity
b) Atomic mass
c) Viscosity
d) Mohs hardness