Q1: 1. Which layer of the Earth is primarily made up of solid iron and nickel?

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

Q2: 2. What is the thickest layer of the Earth?

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

Q3: 3. Which layer of the Earth is divided into the lithosphere and asthenosphere?

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

Q4: 4. Which layer of the Earth is composed mainly of solid rock?

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

Q5: 5. The Earth's magnetic field is generated by movement of molten iron in which layer?

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

Q6: 6. The Mohorovičić Discontinuity marks the boundary between which two layers of the Earth?

• A) Crust and mantle
• B) Mantle and outer core
• C) Outer core and inner core
• D) Crust and outer core

Q7: 7. Which layer of the Earth is the least dense?

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

Q8: 8. The term "asthenosphere" refers to a part of which layer of the Earth?

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

Q9: 9. The Earth's outermost layer, the crust, is primarily composed of which two elements?

• A) Iron and nickel
• B) Silicon and oxygen
• C) Aluminum and magnesium
• D) Carbon and hydrogen

Q10: 10. Which layer of the Earth is responsible for the convection currents that drive plate tectonics?

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

Q11: 11. Which layer of the Earth is also known as the "silent zone" due to its inability to transmit seismic S-waves?

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

Q12: 12. The lithosphere is comprised of the Earth's crust and which other layer?

• A) Mantle
• B) Outer core
• C) Inner core
• D) None of the above

Q13: 13. The core of the Earth is divided into the outer core and which other layer?

• A) Crust
• B) Mantle
• C) Inner core
• D) None of the above

Q14: 14. The temperature of the inner core of the Earth is estimated to be approximately

• A) 1000°C
• B) 3000°C
• C) 5000°C
• D) 7000°C

Q15: 15. The movement of molten iron and nickel in the outer core generates the Earth's

• A) Atmosphere
• B) Magnetic field
• C) Tectonic plates
• D) Ocean currents

Q16: 16. The concept of plate tectonics is closely related to the movement of which layer of the Earth?

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

Q17: 17. The boundary between the crust and the mantle is known as the

• A) Gutenberg Discontinuity
• B) Mohorovičić Discontinuity
• C) Lehmann Discontinuity
• D) Wiechert Discontinuity

Q18: 18. The asthenosphere is located below which part of the Earth's surface?

• A) Continental crust
• B) Oceanic crust
• C) Both A and B
• D) None of the above

Q19: 19. The process of subduction occurs at which specific tectonic plate boundary?

• A) Divergent
• B) Convergent
• C) Transform
• D) None of the above

Q20: 20. The lithosphere is broken into large, rigid pieces known as

• A) Asthenospheres
• B) Tectonic plates
• C) Fault lines
• D) Hot spots

Q21: 21. The Earth's crust is thinnest beneath

• A) Mountains
• B) Oceans
• C) Deserts
• D) Rainforests

Q22: 22. The layer of the Earth where magma is generated is the

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

Q23: 23. The outer core of the Earth is primarily composed of

• A) Solid rock
• B) Molten iron and nickel
• C) Water and gases
• D) Frozen gases

Q24: 24. The Mohorovičić Discontinuity represents a change in which property of the Earth's interior?

• A) Density
• B) Temperature
• C) Composition
• D) Pressure

Q25: 25. The Earth's inner core is solid due to

• A) Low pressure
• B) High pressure
• C) Low temperature
• D) High temperature