The geology of planet Earth: MODEL

Crust 5-70 km thick

• Description: The thin, solid, rocky outer layer of the Earth. 
• Composition: Composed of various solid rocks and minerals. 
• Subdivisions: Divided into oceanic crust (denser, younger) and continental crust (less dense, older). 
• Significance: The layer we live on and where most geological processes occur. 

Mantle 2900 km thick

• Description: The thickest layer of the Earth, located beneath the crust.
• Composition: Made of dense rocks that can flow slowly due to heat and pressure. 
• Movement: Includes the asthenosphere, a layer that allows tectonic plates to move. 
• Significance: The slow movement within the mantle drives tectonic plate activity.

Outer Core 2200 km thick

• Description: A liquid layer of metal, primarily iron and nickel.
• State: Molten due to extremely high temperatures.
• Significance: The movement of this liquid iron generates Earth's magnetic field.

Inner Core 1200km thick

• Description: A solid, dense ball of iron at the Earth's center. 
• State: Solid, despite its high temperature, due to the overwhelming pressure at the planet's core. 
• Significance: The innermost layer of the Earth, influencing its overall structure and behavior. 

BOTH LAYERS INNER CORE AND OUTER CORE ARE 3.400 KM THICK

 

This video shows an easy way to make earth layers model.

HERE YOU HAVE ANOTHER IDEA. BUT THIS IS MORE DIFFICULT.