welcome to ab khan insights in
today's video I am going to tell you about the planet Earth yes this is our
homeland planet and I am going to give you a not we can say that as a brief
information but a long information above the earth so stay tuned in my video and
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to the
video introduction of Earth Planet Earth is the only planet where we
live it is our homeland every person came to this earth and diet
and buried here earth is the third planet from the Sun and the only
astronomical object known to harbor life it means after Sun there are other
plants besides Earth earth is the homeland learning of different living
beings now we shall discuss about its size and structure earth has a diameter
of roughly eight thousand miles or 13,000 kilometers it is round in shap
e
because gravity pulls matter into a ball but it is not perfectly round earth is
really an object Sasha ride it is because it's spin
person it to be square at its poles and smellin at the equator the crust of
Earth is made up of solid silicate rock mostly mossad its mental is solid
silicate rock its outer core is liquid iron and nickel its inner core is dense
solid iron and decay continuing about the earth we shall discuss earthquakes
and volcanoes on Earth crust together with the uppermost par
t of the mental
forms the lithosphere the lithosphere is broken into a series of ektron ik plates
which float on a elastic part of the upper mantle the motion of these plates
give rise to earthquakes and also volcanism now what is earthquake a
sudden violent shaking of the ground due to movements within the Earth's crust or
volcanic action and what is volcanism volcanism is the phenomenon of eruption
of molten rock onto the surface of the earth
from the physical point of view what is a medicine
gravity
let me tell you after all due to the passage of time they will use for every
object various similarly the value for Earth's mass and gravity also varied the
current best estimate for earth mass is five point nine seven to two into ten to
24 kilogram with a standard uncertainty of 6 into 10 power 20 kilogram also with
a relative uncertainty of 10 power minus 4 in modern notation the mass of the
Earth is derived from the gravitational constant capital G and the mean earth
radius by the fol
lowing formula and it's and this formula is M is equal to g m-e
over g equals g r square over their pathology and from this formula we can
also calculate the gravity of Earth small G or little G G is equal to G
chemical and e over R square where R is the radius of the earth M is the mass of
the earth and G is the universal gravitational constant the gravity of
Earth denoted by a little G is the net acceleration that is imparted to objects
due to the combined effect of gravitation and the centrif
ugal force in
SI units G is measured in meter per squared second near Earth's surface
ignoring the effects of air resistance I am repeating this ignoring the effect of
air resistance the value of G for a freely following body is nine point
eight zero seven meter per second square rising somehow upward we shall discuss
about its weather and climate now we shall discuss the axial tilt of the
earth that caused seasonal variations today the earth is tilted on its axis by
twenty three point four degr
ee produce in seasonal variations in climate and
weather across the surface of the planet during the course of five years as we
all know each and every planet and a star has its own orbit in which it
rotates while Earth orbits the Sun the planet is simultaneously spinning on an
imaginary line called an accessible that's run that runs from the North Pole
to the South Pole it takes 23 point nine four hours to complete a rotation on its
and 3/8 is the five point two six days to complete an orbit ar
ound the Sun
remember that Earth is orbiting around the Sun and one day is not equal to
exactly 24 hours it is exactly equal to 23 point nine three four hours precisely
and one year is equal to 365 point two six days normally round off as 365 days
I am showing you the statistics about the Earth's orbit according to NASA
National Aeronautics and Space Administration statistics average
distance from the Sun is 9 - 9 5 6 0 5 0 miles or one for nine five nine eight
two six two kilometers and it's pe
rihelion
it means the closest approach to the Sun is nine months four zero two six four
zero miles or one four seven zero nine eight two nine one kilometers
ma Yan means farthest distance from the Sun is 94509 four six zero miles or one
five two zero nine eight two three three kilometers and length of a solar day is
twenty three point nine three four hours approximately equal to 24 hours length
of a year single revolution around the Sun is 365 point two six days
approximately rounded office 365
days and equilateral equatorial inclination
to orbit is twenty three point four three nine three degrees which is
approximately equal to its Excel fill twenty three point four degrees it means
that the NZ tilt or the earth is spinning around its own axis along this
imaginary line and it is twenty three point four degree now we shall discuss
about the Earth's formation this regard to the history of the earth scientists
think that earth was formed at roughly the same time as the Sun and other
plan
ets some 4.6 billion years ago Vanda solar system cool assist from a
giant rotating cloud of gas and dust known as the solar nebula as the nebulae
collapse because of its gravity it's fun faster and flatted into a disc all about
Sun stars and nebulas galaxies I will ten in my next upcoming videos now we
shall discuss about the magnetic field of the art yes art has its own magnetic
field the Earth's magnetic field is generated within the molten outer core
region of the planet and extends outwards
to form the magnetosphere as
the named magnetosphere indicates that the magnetic field of the earth magnetic
field around the around a sphere a spherical ball a magnetosphere is a
barrier surrounding the earth now I'm telling you the definition a
magnetosphere is a barrier surrounding the earth reflecting particles of the
solar wind and protecting the earth from sun's radiation as we know there are
many harmful radiations coming from the Sun now we shall discuss about the
Earth's atmosphere yes
our earth has its own atmosphere our atmosphere is a kind
of a protective layer around the earth to protect us from many many harmful
radiations or other things our cosmic rays or other such things Earth's
atmosphere is roughly 78% nitrogen and 21% oxygen with the trace amounts of
water argon carbon dioxide and other gases argon is a noble gas now and now
we have nowhere else in the solar system is there an atmosphere loaded with free
oxygen yes overall in our solace in the solar
system earth i
s the one and only planet to have
free molecular oxygen in its atmosphere air surrounds earth and becomes thinner
farther from the surface roughly 100 miles or 160 kilometers above Earth the
air is so thin that satellites can zip through the atmosphere and little
resistance still traces of atmosphere can be found as high as 370 miles or 600
kilometres above the planet's surface there are several layers in the
atmosphere we shall discuss about troposphere the lowest layer of the
atmosphere is kno
wn as troposphere it is constantly in motion due to this
layer we have weather on earth yes troposphere is a such layer that is the
cause of weather weather weather and time
the other layer is stratosphere above the troposphere some 30 miles or 48
kilometers above the Earth's surface is the stratosphere above the Earth's
surface aprox 48 kilometers or 30 miles is the
stratosphere the still air of the stratosphere contains the ozone layer
and ozone layer what is ozone layer ozone layer is created
when ultraviolet
radiations or light caused try awesome oxygen attempts to bind together into
ozone molecules the chemical equation for the formation of ozone o3 is as
follows this is the simple equation or 2 plus UV radiations makes a makes split
of oxygen molecule and to such oxygen molecules combines it to molecular
oxygen to moles of molecular oxygen to makes 2 mole of ozone molecule and the
net objection is 3 moles of oxygen with UV radiations makes two moles of ozone
remember that I have
collected this data from the website of www dot C I M s s
dot SS e C dot e-d-u dot-com the other layer is mrs. field the mesosphere
starts just above the stratosphere and extends up to and extends up to 85
kilometers or 53 miles high yes as the name indicates missus pair meteors burn
up in this layer meteors at objects that come from the space after mrs. where the
thermosphere starts the thermosphere starts just above the mesosphere and
extends to 600 kilometers or 372 miles high Aurora and sate
llites occurring
this layer the other layer is ionosphere the ionosphere is an abundant layer of
electrons and ionized atoms and molecules that stretches from about 48
kilometers or 30 miles above the surface of the edge of space the ionosphere is a
critical link in the chain of Sun Earth interactions this region is what makes
radio communications possible the last layer is
exosphere this is a per limit of our atmosphere
a perimeter it extends from the top of the karma sphere up to ten thousand
kilometers or 6,200 miles I I have told you the six atmospheric layers naming
troposphere stratosphere mesosphere then thermosphere ionosphere and and so
sphere in the stratosphere there is another layer included in it ozone layer
now we shall discuss about the life on Earth earth is the only planet in the
universe known to crawl possess life scientists are nowadays discovering many
planets that they think that they are there is possibility of life but now
till now in the universe the only plane
t to possess life is only the earth the
planet boasts several million species of life living in heavy pairs raining from
the bottom of the deepest ocean you are few miles into the atmosphere so you
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