2
Question
Third layer of Earth which comes after Mantle of Earth is known as __________________.
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Solution
The correct option is D The Outer Core
Earth mainly consists of four
layers namely crust, mantle, outer core and inner core:
Crust: This is about 8 km
thick inside and is highly explored. The continental crust is composed mostly
of granite. The oceanic crust consists of a volcanic lava rock called
basalt.
Mantle: It is the largest
layer of the Earth which is 1800 miles thick. It is composed mostly of
silicate rocks rich in magnesium and iron.
Outer core: It is located
beneath the mantle. The outer core is composed of melted metals like nickel and
iron.
Inner core: It is composed of
an iron-nickel alloy and some light elements.
Layer that lies immediately after the mantle is the outer core.
Earth mainly consists of four layers namely crust, mantle, outer core and inner core:
Crust: This is about 8 km thick inside and is highly explored. The continental crust is composed mostly of granite. The oceanic crust consists of a volcanic lava rock called basalt.
Mantle: It is the largest layer of the Earth which is 1800 miles thick. It is composed mostly of silicate rocks rich in magnesium and iron.
Outer core: It is located beneath the mantle. The outer core is composed of melted metals like nickel and iron.
Inner core: It is composed of an iron-nickel alloy and some light elements.
Layer that lies immediately after the mantle is the outer core.
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