quiz

Interior of Earth

1. Which part of the Earth is the outermost solid layer?

  • A) Crust
  • B) Mantle
  • C) Inner core
  • D) Outer core
A) Crust Explanation

2. In the oceanic crust, what kind of rock is most common?

  • A) Granite
  • B) Limestone
  • C) Sandstone
  • D) Basalt
D) Basalt Explanation

3. Which region has the thickest continental crust?

  • A) Himalayan region
  • B) Mid-Atlantic Ridge
  • C) Pacific Ring of Fire
  • D) Great Rift Valley
A) Himalayan region Explanation

4. What is the primary source of heat in the mantle?

  • A) Nuclear fusion
  • B) Radioactive decay
  • C) Geothermal energy
  • D) Solar radiation
B) Radioactive decay Explanation

5. Which phenomenon in the mantle is responsible for the movement of tectonic plates?

  • A) Convection
  • B) Conduction
  • C) Radiation
  • D) Subduction
A) Convection Explanation

6. What is the primary composition of Earth’s core?

  • A) Iron and nickel
  • B) Silicate minerals
  • C) Lead and uranium
  • D) Felsic materials
A) Iron and nickel Explanation

7. Which layers make up the lithosphere?

  • A) Outer core and inner core
  • B) Liquid outer core and mantle
  • C) Crust and upper mantle
  • D) Asthenosphere and lower mantle
C) Crust and upper mantle Explanation

8. Which theory suggests that convection in the outer core, combined with the Coriolis effect, generates Earth’s magnetic field?

  • A) Dynamo theory
  • B) Tectonic theory
  • C) Plate tectonics theory
  • D) Seismic theory
A) Dynamo theory Explanation

9. The lowest part of the mantle next to the core-mantle border is known as

  • A) Transition zone
  • B) B-layer
  • C) D″ (D-double-prime) layer
  • D) C-layer
C) D″ (D-double-prime) layer Explanation

10. Which layer of the Earth is the thickest?

  • A) Crust
  • B) Mantle
  • C) Outer Core
  • D) Inner Core
B) Mantle Explanation

11. Where is “Sial” primarily found?

  • A) Ocean floor
  • B) Continents
  • C) Mantle
  • D) Inner core
B) Continents Explanation

12. How is the Earth divided into layers based on mechanical properties?

  • A) Crust, mantle, core
  • B) Lithosphere, crust, mantle, outer core
  • C) Crust, asthenosphere, inner core
  • D) Lithosphere, asthenosphere, mesosphere, outer core, inner core
D) Lithosphere, asthenosphere, mesosphere, outer core, inner core Explanation

13. What is the name given to the plates capable of moving relative to each other?

  • A) Tectonic plates
  • B) Seismic plates
  • C) Inner core
  • D) Mantle
A) Tectonic plates Explanation

14. What protects life on Earth from interplanetary radiation?

  • A) Earth's atmosphere
  • B) The mantle
  • C) The magnetic field generated by the core flow
  • D) The Curie temperature
C) The magnetic field generated by the core flow Explanation

15. What is the Earth’s mantle primarily composed of?

  • A) Iron and nickel
  • B) Silicate rocks
  • C) Water and gas
  • D) Granite
B) Silicate rocks Explanation

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