The Oxygen Cycle (Easy Explanation) Video Lecture - Class 9

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let us move on to the next cycle which
is the oxygen cycle even before we talk
about the oxygen cycle what is oxygen
and in what amount is it present in our
atmosphere the 21% of the Earth's
atmosphere is oxygen so maximum is
nitrogen and the next is oxygen and as
we all know that oxygen is them with one
of the most important gas which is
needed for living organisms because
oxygen plays a crucial role in
respiration and without respiration
reading organic soup we cannot survive
now as far as existence is concerned
oxygen occurs in combining form in
Earth's curls as well as in air in the
form of carbon dioxide so oxygen has the
ability to make oxide that is it can
combine with other elements to form
their options for example it combines
with carbon to form carbon dioxide it
combines with hydrogen to form water it
combines with nitrogen to form nitrogen
oxides and so on so in the combined form
it existant oxide it is an important
component of carbohydrates proteins
lipids and nucleic acids which are basic
building block of all day life form so
let us now talk about the oxygen cycle
now again oxygen cycle is back Titan
which maintains the levels of oxygen in
the vector space radium Li will
basically talk about the processes which
gives oxygen to the atmosphere and again
those processes which take heavy oxygen
from the atmosphere the letters first
talk about the processes their oxygen
gets used up from atmosphere oxygen is
taken up from that motion
so first such process would be
combustion so any burning takes place
only in presence of oxygen so for
burning or compare
to take place you need oxygen
respiration which happens in all living
organisms both plants and animals where
oxygen is taken up to oxidize the food
which is generally in the form of
glucose and the food and oxidized to
reduce carbon dioxide water and a lot of
energy so this is our food gets
converted to energy and this process
happens only by intake of oxygen so this
is another important process by which
oxygen is taken up from the atmosphere
besides that formation of oxide lake
formation of nitrogen oxides now you
would have seen that the atmospheric
nitrogen that is or that is not
inducible formed by plants or animal so
the nitrogen gets converted into ammonia
and nitrite the nitrates
so all these nitrate nitrate do often
forms of oxides and to form oxides they
need oxygen
so whenever any other element want to
form its oxide tries to combine with
oxygen so when it combines with oxygen
it is basically taking up oxygen from
the atmosphere so these are three basic
areas a oxygen is used up from the
atmosphere the primary thing still being
respiration now how do how is oxygen
given back to the atmosphere by the
process of photosynthesis because in
photosynthesis
carbon dioxide is taken up from that
much damage it combines with water to
form food in the form of glucose and a
byproduct is oxygen along with a lot of
energy so oxygen is released in the
process of photosynthesis so oxygen
Andalus a to photosynthesis and
respiration directly both processes
respiration takes up oxygen from
atmosphere and photosynthesis gives back
oxygen to that process now if you look
at this diagram you see of atmospheric
oxygen is used up during respiration now
in the desperation what happened in case
of restoration along with oxygen and a
result of recreation carbon kind of
silent water at the product if you see
it in desperation ii dioxide and water
at the products now in photosynthesis
carbon dioxide and water are the
reactants that is the good combined to
form or finish the design simple as that
now when you talk about at the result of
photosynthesis we see space to and
voltage which is glucose and this view
horse is very acting for installation so
that gives two processes photosynthesis
and respiration these two processes
themselves explain main dialogue station
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