Oxygen helps in Burning Video Lecture | Science for Class 6

hello friends this video on air around
us part 9 is brought to you by exam for
calm no more fear from exam oxygen also
helps the entire process of burning it
not only helps in fact without oxygen
burning cannot happen now these are some
of the scenarios where we experience
burning ready see burning takes place
when you burn a piece of paper burning a
log of good so when you burn a log of
good what happens it generates heat
energy and that heat energy is used for
cooking burning crackers burning a
candle which gives us light so there are
a lot of scenarios when burning is
needed by us
so this burning is not possible without
oxygen now it might sound a little
surprising to you that how oxygen is
important for burning let's try if we
can burn without oxygen so let's say we
take two candles so you try it out
yourself you take two candles which are
welded so you keep them just I mean
apart from each other so just you can
say on the same table one after another
now you take two glasses one big the
other one small now invert the two
glasses and cover the cover both the
candles so one candle is covered by the
big glass the other candle is covered by
the smaller glass right now what would
you observe now you will see that the
candle is still glowing for some more
time even when it is covered with a
glass but after some times you will see
that the candle which was within the
smaller glass
it got extinguished before so it goes
off early when compared to the other one
but again after some and the other hand
will also went off but what we observed
was this candle let let's name them this
is one
this is true so we observed that two
candle two went of earthly so why did
that happen in fact the question is why
did the can't handle whoa why is it not
burden anymore that's because now when
we cover it with this glass so now the
air that is present within the glass
that's the only air that is available to
the candle right
so whatever air is present inside this
glass so in that air oxygen is present
so the candle is continuously utilizing
that oxygen to burn but a timely chills
when the oxygen is completely exhausted
because now you have closed it within a
glass so you had limited supply of
oxygen so the supply of oxygen got over
and when the supply of oxygen got over
the candle went off now in the bigger
glass you had more air since the glass
is big so there is more space for air so
if there is more air that means there is
more oxygen so the candle got supplying
for more time so the candle was glowing
for a longer time whereas in the smaller
glass there is less in now since there
is less and therefore there is less
oxygen if there is less oxygen so the
candle will not get supply of enough
oxygen and it will go off quickly so
that's the simple logic through this
very clearly proves that we cannot burn
an object without oxygen so a little
very much necessary for the void burning
process to take place thank you
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