The document summarizes the structure and composition of the Earth's interior. It describes the Earth as having four main layers from outermost to innermost - the crust, mantle, outer core, and inner core. The crust is the top solid rocky layer that makes up the continents and ocean floors. Below is the mantle, which constitutes 84% of the Earth's volume and is predominantly solid but behaves like a viscous liquid. Within the mantle is the Earth's liquid outer core followed by the inner solid core made of iron and nickel.

1. INSIDE THE
EARTH

2. Structure of the Earth
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 Earth's lithosphere includes
the crust and the uppermost
mantle, which constitute the
hard and rigid outer layer of
the Earth. Earth's inner
core is Earth's innermost part
and is a
primarily solid ball with
a radius of about 1,220 km.
 Earth's outer core is a liquid
layer about 2,266 km thick
composed
of iron and nickel that lies
above Earth's solid inner
core and below its mantle. Its
outer boundary lies 2,890 km
beneath Earth's surface.

3. CRUST
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 The crust is the
outermost solid shell of a
rocky planet or natural
satellite, which is
chemically distinct from
the underlying mantle.
 The crust of the Earth is
composed of a great
variety
of igneous, metamorphic,
and sedimentary rocks.

4. CONTINENTAL CRUST
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 The continental crust is the
layer of igneous, sedimentary,
and metamorphic
rocks which forms
the continents and the areas
of shallow seabed close to
their shores, known
as continental shelves. This
layer is sometimes called sial
because there is more felsic,
or granitic, Consisting
mostly of granitic rock,
continental crust has a
density of about
2.7 g/cm3 and is
less dense than the material
of the Earth's mantle

5. Oceanic crust
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 Oceanic crust is the part of
Earth's lithosphere that
surfaces in the ocean basins.
Oceanic crust is primarily
composed ofmafic rocks,
or sima, which is rich in iron
and magnesium. It is thinner
than continental crust, or sial,
generally less than 10
kilometers thick; however it is
denser, having a mean density
of about 2.9 grams per cubic
centimeter as opposed to
continental crust which has a
density of about 2.7 grams
per cubic centimeter.

6. MANTLE
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 Earth's mantle is a
silicate rocky shell about
2,900 kilometres thick
that constitutes about
84% of Earth's volume. It
is predominantly solid
but in geological time it
behaves like very viscous
liquid. The mantle
encloses the hot core rich
in iron and nickel, which
occupies about 15% of
Earth's volume.

7. LITHOSPHERE
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 A lithosphere is the
rigid,outermost shell of a
rocky planet, and can be
identified on the basis of its
mechanical properties.
On Earth, it comprises
the crust and the portion of
the upper mantle that
behaves elastically on time
scales of thousands of years
or greater. The outermost
shell of a rocky planet, the
crust, is defined on the basis
of its chemistry and
mineralogy.

8. Asthenosphere
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 The asthenosphere is the
highly viscous,
mechanically
weak ductilely deforming
region of the
upper mantle of
the Earth. It lies below
the lithosphere, at depths
between approximately
80 and 200 km (50 and
120 miles) below the
surface.

9. CORE
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 The average density of Earth is
5,515 kg/m3. Since the average
density of surface material is only
around 3,000 kg/m3, we must
conclude that denser materials
exist within Earth's core. Seismic
measurements show that the core
is divided into two parts, a
"solid" inner core with a radius of
~1,220 km and a liquid outer
core extending beyond it to a
radius of ~3,400 km. The densities
are between 9,900 and
12,200 kg/m3 in the outer core and
12,600–13,000 kg/m3 in the inner
core.

10. INNER CORE
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 Earth's inner core is
Earth's innermost part
and is a
primarily solid ball with
a radius of about
1,220 km. It is believed
to consist primarily of
an iron–nickel alloy and
to be approximately the
same temperature as the
surface of the Sun:
approximately 5430 °C.

11. OUTER CORE
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 The outer core of the Earth
is a liquid layer about 2,260
km thick composed of iron
and nickel which lies above
the Earth's solid
inner core and below its
mantle. Its outer boundary
lies approximately 2,890 km
(1,800 mi) beneath the
Earth's surface.

12. THANK YOU HAVE NICE
DAY
MADE BY SWAROOP RAJ
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