Layers of The Earth
Crust
The earth's crust is made up of
sedimentary, igneous, and metamorphic
rocks. It is from five to twenty miles thick.
Most of the earth's crust is covered by oceans.
Mantle
The mantle is the layer of the earth
below the crust of the earth. The mantle
is made of solid rock which is one thousand
eight hundred miles thick. It is very, very
hot and becomes increasingly hot as
it nears the core of the earth.
Outer Core
The outer core is the layer of the earth just
below the earth's mantle. The outer core is made
up of melted metals. It is hotter than the mantle
and is about one thousand four hundred miles
thick. The heat results in the melting of the
solid rock into magma. Magma moves through
the layers of the earth and bursts through
the crust of the earth causing volcanoes.
Inner Core
The inner core of the earth is the
sphere-shaped center of the earth.
The inner core is made up of solid metal.
The distance from the edge of the inner
core to its center is a bout eight hundred
miles. The temperature of the inner core
is incredibly high at 9,000 F (5,000 C).
Pinegreenwoods Montessori
Montessori Astronomy
