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Questions and Answers
Que caracteriza a litosfera?
Que caracteriza a litosfera?
- É ríxida e está formada por placas (correct)
- Comportase de forma plástica en todas as áreas
- Ten un espesor variable dependendo do manto
- É completamente líquida na súa parte inferior
Que se observa no manto superior sublitosférico?
Que se observa no manto superior sublitosférico?
- Mantén unha temperatura constante en toda a súa extensión
- Comportase de forma plástica preto de puntos de fusión (correct)
- Ten un espesor constante independentemente da litosfera
- Está totalmente composta por rochas líquidas
Qual é a principal característica do núcleo externo?
Qual é a principal característica do núcleo externo?
- Está en estado líquido (correct)
- É sólido e denso
- Ten un espesor moi reducido
- Está composto por rochas que son ríxidas
Que sucede no núcleo interno?
Que sucede no núcleo interno?
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Que composición ten o manto inferior?
Que composición ten o manto inferior?
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Study Notes
Lithosphere
- Rigid layer that makes up the Earth's outer layer, from the crust to the upper mantle.
- Composed of tectonic plates.
Sub-Lithospheric Upper Mantle
- Found below the lithosphere, extending to the Repetti discontinuity.
- Its thickness varies according to the thickness of the lithosphere.
- Exhibits variations in wave velocity.
- Behaves as a rigid material, becoming partially molten near melting points, showcasing plastic behavior.
Lower Mantle
- Situated between the Repetti discontinuity and the Gutenberg discontinuity.
- Composed of dense rocks exhibiting plastic behavior.
Outer Core
- Located between the Gutenberg discontinuity and the Weichert-Leihman discontinuity.
- Exists in a liquid state.
- The D" layer, marking the transition with the mantle, causes a decrease in wave velocity.
- Materials experience melting due to ascending flow currents.
Inner Core
- Extends from the Weichert-Leihman discontinuity to a depth of 6,371 km.
- Represents a solid metallic sphere where pressure solidifies materials.
- The movement against the liquid outer core generates electron currents.
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