Structure of the Earth

How many distinct sets of seismic waves did Mohorovicic record that led to the discovery of the Earth's crust?

• One

• Two

• Three

• Four

At what depth does the Earth's core start?

• 1000 km

• 2900 km

• 4800 km

• 6371 km

What is the thickness of the lithosphere approximately?

• 10 km

• 25 km

• 50 km

• 100 km

Which of the following best describes the lithosphere?

• The liquid outer core of the Earth

• The solid crust and upper mantle of the Earth

• The gaseous atmosphere surrounding the Earth

• The molten rock layer beneath the Earth's crust

What are the interlocking pieces that make up the Earth's crust called?

• Mantles

• Cores

• Plates

• Lithospheres

What phenomenon is caused by the movement of Earth's plates?

• Erosion

• Sedimentation

• Plate Tectonics

• Weathering

What is the significance of the Mohorovicic discontinuity (Moho)?

• It marks the boundary between the inner and outer core

• It indicates the start of the mantle from the crust

• It separates the lithosphere and asthenosphere

• It is where the Earth's magnetic field is generated

What material is the mantle rich in?

• Silica and Aluminum

• Iron and Magnesium

• Sodium and Potassium

• Carbon and Hydrogen

What characterizes the inner core?

• Liquid nature

• Gaseous nature

• Solid character

• Viscous nature

What are the four major components of Earth's structure?

• Crust, Lithosphere, Mantle, Core

• Crust, Mantle, Outer Core, Inner Core

• Crust, Atmosphere, Mantle, Core

• Crust, Mantle, Asthenosphere, Core