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Earth structure
Contributed by: Ellison
  • 1. What is the thickest layer of the Earth?
A) Mantle
B) Inner core
C) Crust
D) Outer core
  • 2. Which layer of the Earth is liquid iron and nickel?
A) Crust
B) Outer core
C) Mantle
D) Inner core
  • 3. The layer beneath the lithosphere is called the:
A) Inner core
B) Outer core
C) Mantle
D) Asthenosphere
  • 4. The Earth's mantle is mainly composed of which mineral group?
A) Sulfides
B) Carbonates
C) Silicates
D) Oxides
  • 5. Where is the Mohorovičić discontinuity located?
A) Between the outer core and inner core
B) Between the crust and mantle
C) Between the mantle and outer core
D) Within the inner core
  • 6. The crust and upper part of the mantle together form the:
A) Mesosphere
B) Asthenosphere
C) Lithosphere
D) Thermosphere
  • 7. What is the boundary between the Earth's crust and mantle characterized by differences in seismic wave velocities?
A) Gutenberg discontinuity
B) Outer core boundary
C) Mantle transition
D) Mohorovičić discontinuity
  • 8. Which type of boundary is formed when two tectonic plates move away from each other?
A) Transform boundary
B) Subduction boundary
C) Convergent boundary
D) Divergent boundary
  • 9. The core of the Earth is primarily made of:
A) Silicon and oxygen
B) Carbon and sulfur
C) Aluminum and magnesium
D) Iron and nickel
  • 10. What is the Earth's thinnest layer?
A) Inner core
B) Mantle
C) Outer core
D) Crust
  • 11. What is the name of the process by which heat is transferred from the Earth's core to the surface?
A) Radiation
B) Subduction
C) Convection
D) Conduction
  • 12. What is the scientific theory that explains the movement of Earth's lithospheric plates?
A) Plate tectonics
B) Continental drift
C) Earthquake theory
D) Seafloor spreading
  • 13. The presence of what mineral gives the Earth's mantle its greenish color?
A) Quartz
B) Feldspar
C) Olivine
D) Hematite
  • 14. What is the state of matter in the Earth's outer core?
A) Gas
B) Liquid
C) Plasma
D) Solid
  • 15. What type of rock is the Earth's mantle mostly composed of?
A) Basalt
B) Peridotite
C) Granite
D) Sandstone
  • 16. The Earth's lithosphere is broken into pieces known as:
A) Continents
B) Tectonic plates
C) Volcanoes
D) Mountain ranges
  • 17. What occurs when tectonic plates collide, causing one plate to be forced below the other?
A) Rift
B) Sliding
C) Spreading
D) Subduction
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