What is the largest layer of earth's interior?

Choices are


crust


inner core


outer core


mantleWhat is the largest layer of earth's interior?
The mantle is the largest layer at about 2900 km thickness. It also makes up about 70% of the earth's volume.





The inner and outer core only constitute about 30% of the volume at about 1220 km thick and 2200 km thick, respectively. The crust is the smallest layer at about 5-70 km thick depending on the type of crust (oceanic or continental) and location.What is the largest layer of earth's interior?
The mantle consists of three parts: the lower part of the lithosphere, the region below it known as the asthenosphere, and the region below the asthenosphere called the lower mantle. The entire mantle extends from the base of the crust to a depth of about 2,900 km (about 1,800 mi). Scientists believe the asthenosphere is made up of mushy plastic-like rock with pockets of molten rock. The term asthenosphere is derived from Greek and means “weak layer.” The asthenosphere’s soft, plastic quality allows plates in the lithosphere above it to shift and slide on top of the asthenosphere. This shifting of the lithosphere’s plates is the source of most tectonic activity. The asthenosphere is also the source of the basaltic magma that makes up much of the oceanic crust and rises through volcanic vents on the ocean floor.





The mantle consists of mostly solid iron-magnesium silicate rock mixed with many other minor components including radioactive elements. However, even this solid rock can flow like a “sticky” liquid when it is subjected to enough heat and pressure.
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