Earth Structure

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Q. The mantle of the Earth is mainly composed of which type of rock? (2019)
  • A. Igneous
  • B. Sedimentary
  • C. Metamorphic
  • D. Basaltic
Q. The Mohorovičić discontinuity separates which two layers of the Earth? (2023)
  • A. Crust and Mantle
  • B. Mantle and Outer Core
  • C. Outer Core and Inner Core
  • D. Crust and Outer Core
Q. What is the approximate depth of the Earth's mantle?
  • A. Up to 700 km
  • B. Up to 2,900 km
  • C. Up to 5,000 km
  • D. Up to 6,371 km
Q. What is the approximate depth of the Mohorovičić discontinuity (Moho)?
  • A. 5 km
  • B. 10 km
  • C. 30 km
  • D. 50 km
Q. What is the approximate temperature at the boundary between the Earth's crust and mantle? (2020)
  • A. 200°C
  • B. 500°C
  • C. 1,000°C
  • D. 1,500°C
Q. What is the approximate temperature at the Earth's inner core? (2023)
  • A. 4000°C
  • B. 5000°C
  • C. 6000°C
  • D. 7000°C
Q. What is the approximate temperature range of the Earth's mantle? (2020)
  • A. 200-400 °C
  • B. 500-900 °C
  • C. 1,000-3,000 °C
  • D. 3,000-5,000 °C
Q. What is the approximate temperature range of the Earth's outer core? (2020)
  • A. 1,000 - 2,000 °C
  • B. 2,000 - 4,000 °C
  • C. 4,000 - 6,000 °C
  • D. 6,000 - 8,000 °C
Q. What is the approximate thickness of the Earth's crust? (2021)
  • A. 5-10 km
  • B. 30-50 km
  • C. 70-100 km
  • D. 100-150 km
Q. What is the average density of the Earth? (2020)
  • A. 2.5 g/cm³
  • B. 5.5 g/cm³
  • C. 7.5 g/cm³
  • D. 9.5 g/cm³
Q. What is the estimated temperature at the Earth's inner core?
  • A. 4000°C
  • B. 5000°C
  • C. 6000°C
  • D. 7000°C
Q. What is the main component of the Earth's mantle? (2019)
  • A. Silicate minerals
  • B. Iron
  • C. Nickel
  • D. Water
Q. What is the primary component of the Earth's crust? (2021)
  • A. Iron
  • B. Silicon
  • C. Oxygen
  • D. Aluminum
Q. What is the primary composition of the Earth's crust? (2022)
  • A. Basalt and granite
  • B. Iron and nickel
  • C. Silicate minerals
  • D. Water and gases
Q. What is the primary composition of the Earth's inner core?
  • A. Solid iron
  • B. Liquid iron
  • C. Silicate rocks
  • D. Water
Q. What is the primary composition of the Earth's outer core? (2022)
  • A. Solid rock
  • B. Liquid iron and nickel
  • C. Silicate minerals
  • D. Granite
Q. What is the primary method used to study the Earth's interior? (2023)
  • A. Seismic waves
  • B. Magnetic field analysis
  • C. Gravitational studies
  • D. Satellite imagery
Q. What is the primary reason for the Earth's magnetic field? (2020)
  • A. Movement of the crust
  • B. Flow of molten iron in the outer core
  • C. Solar winds
  • D. Tectonic activity
Q. What is the primary reason for the movement of tectonic plates?
  • A. Gravity
  • B. Convection currents
  • C. Magnetic forces
  • D. Centrifugal force
Q. What is the primary state of matter in the Earth's outer core? (2019)
  • A. Solid
  • B. Liquid
  • C. Gas
  • D. Plasma
Q. Which layer of the Earth is directly beneath the crust?
  • A. Mantle
  • B. Outer Core
  • C. Inner Core
  • D. Lithosphere
Q. Which layer of the Earth is liquid? (2021)
  • A. Crust
  • B. Mantle
  • C. Outer Core
  • D. Inner Core
Q. Which layer of the Earth is primarily composed of iron and nickel? (2020)
  • A. Crust
  • B. Mantle
  • C. Outer Core
  • D. Inner Core
Q. Which layer of the Earth is responsible for generating the Earth's magnetic field? (2023)
  • A. Crust
  • B. Mantle
  • C. Outer Core
  • D. Inner Core
Q. Which layer of the Earth is responsible for tectonic activity?
  • A. Crust
  • B. Mantle
  • C. Outer Core
  • D. Inner Core
Q. Which layer of the Earth is responsible for tectonic plate movement? (2019)
  • A. Crust
  • B. Mantle
  • C. Outer Core
  • D. Inner Core
Q. Which layer of the Earth is responsible for the generation of the Earth's magnetic field?
  • A. Crust
  • B. Mantle
  • C. Outer Core
  • D. Inner Core
Q. Which layer of the Earth is responsible for volcanic activity? (2023)
  • A. Crust
  • B. Mantle
  • C. Outer Core
  • D. Inner Core
Q. Which layer of the Earth is solid and composed mainly of iron and nickel? (2021)
  • A. Crust
  • B. Mantle
  • C. Outer Core
  • D. Inner Core
Q. Which layer of the Earth is solid and composed mainly of silicate rocks?
  • A. Crust
  • B. Mantle
  • C. Outer Core
  • D. Inner Core
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