13.  What is the soft layer of the mantle on which the lithosphere floats?*1 pointAsthenosphereDensity in convection currentSedimentary RocksLithosphere

Question Analysis

The question is asking for the name of the soft layer of the mantle that supports the lithosphere.

Relevant Concepts

• Lithosphere: The rigid outer layer of the Earth, composed of the crust and uppermost part of the mantle.
• Asthenosphere: The semi-fluid layer beneath the lithosphere which allows for the movement of tectonic plates.

Answer Examination

1. Asthenosphere: This is the correct answer as it refers specifically to the soft, ductile layer of the mantle that supports the lithosphere.
2. Density in convection current: This is related to material movement within the mantle but does not directly answer the question.
3. Sedimentary Rocks: These are types of rocks formed from the accumulation of sediments and are not related to the mantle layers.
4. Lithosphere: This refers to the rigid layer above the asthenosphere.

Final Answer

The soft layer of the mantle on which the lithosphere floats is the Asthenosphere.