AirAroundUs

PRESENCE OF OXYGEN IN WATER AND SOIL

Ma’am , during these holidays I visited
my grandparents’ house in Dehradun
and I enjoyed a lot. I even learnt some
interesting things about air.

Good morning
students. How was
your weekend?

Okay, what did you learn Ma’am, I learnt that air is very
about air? essential for human beings. The
oxygen that we breathe in to survive is
also a component of air.

Do plants also require oxygen?

Yes, I guess because all
living organisms require
oxygen for their survival.

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But how does oxygen become Ms. Sharma takes some water in a
available to the plants? glass or metal container and heats
it slowly on a tripod stand.
Let us go to the lab so that I
can show you how this Aim: Presence of air
happens. in water and soil.

Children look carefully at the inner Aim: Presence of air
surface of the container. What do in water and soil.
you observe?

Aim: Presence of air
in water and soil.

Ma’am air bubbles.

What do you infer from
your observation?

Aim: Presence of
oxygen in water
and soil.

Air is dissolved in water.

Absolutely correct! And when you
heat the water, to begin with, the
air dissolved in it escapes. This is
how organisms breathe in water.

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REPLACEMENT OF OXYGEN IN ATMOSPHERE

We have to take a lump I saw bubbles of air
of dry soil in a beaker coming out from
and add water to it. the soil, ma’am!

Replacement of oxygen in atmosphere.

Replacement of oxygen in atmosphere.

Now let me show
you how the
organisms that live
inside the soil
breathe.

These bubbles indicate the presence of air Oh! Now I understand
in the soil. When the water is poured on how the organisms
the lump of soil, it displaces the air, which breathe inside the soil.
is seen in the form of bubbles.

Replacement of oxygen in atmosphere.

Replacement of oxygen in atmosphere. Now let us go to the
school garden to see
What do you infer from organisms living in the
your observation? soil.

Ma’am, air is Replacement of oxygen in atmosphere.
dissolved in water.

Children, look closely. You will
see organisms living in the soil.
Can you name these
organisms?

Ma’am are these You are right. These can be seen
earthworms? more commonly during the rainy
season. When it rains, water
Ma’am ,do these occupies the air spaces present in
earthworms harm the soil. So to breathe, these
the soil? earthworms come out of the soil.

Ma’am besides earthworms do
other organisms also live in soil?

No, dear. On the contrary they are Yes, there are various
regarded as farmers' friends. They micro-organisms which
increase the fertility of soil as their live in the soil like
movement facilitates aeration of soil. azotobacter bacteria
which provide nitrogen to
* Aeration: To give supply of air. the plants.

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USES OF AIR

Vanshika, how It was good Papa!
was your day I really enjoyed
today at school? the science class
today.

We performed a lot of
activities to show the
presence of air in
water and soil.

But papa, I am just I am quite happy to see
wondering when oxygen is that you are learning by
being used by everyone then doing the things in a
why does not it get finished? joyful way.

That’s a wonderful
question. Have you
heard about
photosynthesis?

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Yes papa, in the school I learnt Correct. When plants
that the word photo means ‘light’ make their own food,
and synthesis means ‘to put oxygen is also
together’. produced along with
it.
A plant uses sunlight and
chlorophyll to put together The balance of oxygen and carbon
chemical compounds like carbon dioxide in the atmosphere is
dioxide and water and turns maintained through respiration in
them into carbohydrates or food. plants and animals and by
photosynthesis in plants.
Plants also consume oxygen for
respiration, but they produce
more oxygen than they consume
so we say that plants produce
oxygen.

That’s interesting. Can
you please give me
some other examples
in which air is
important?

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Yes, sure dear. Air helps in
the movement of sailing
yachts, gliders, parachutes
and aeroplanes. Air also
helps in the dispersal of
seeds and pollen of flowers
of several plants.

Also, Papa, birds,
bats and insects can
fly due to the
presence of air.

Absolutely! The wind
also makes the
windmill rotate.

The windmill is used to Papa, what is
draw water from tube the use of a
wells and to run flour windmill ?
mills.
I am really amazed
to see how air plays
such an important
role in our life.

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Papa, are windmills Windmills convert the
used to generate energy of their moving
electricity as well? blades into electrical
energy. In India, windmills
are installed in states like
Gujarat, Tamil Nadu,
Maharashtra and
Rajasthan

You must be hungry
by now. Let’s go and
have lunch, your
mother must be
ready with it.

Yes sure Papa.

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WORD SEARCH

Find the word in the puzzle

ENU P KP L FH T HE WG WR D H
WR E WR J S FL Y OO RL IY T G
LSE Y NH G WB K KB UA NH F G
J LH H JD F MS S MO KE DP M V
DM I O PW U JE M BW GJ YA H R
R YW F TS Y RD J BY BN GV A J
CIK F MF O AU D XS VI HH H T
BD J I GC V MS O GT JD EJ WO
BIB G OF P WT O PM RN CA I W
PFY B VN U FP A BA AI PF P K
BJA J HG J NA F PS VT EY O C
SDK A IU E HR P MW HR TNM P
UJP O TE F AT T HC KO EL T F
SUS WRK WYI E IE EG YT G K
I NP V CD I LC N HC EE FM A E
RR J L PU J UL W HK HN YF NW
BBT O KE V RE G UV BH SU O O
ADN N NG F VP V MW NW KC T L

MIXTURE OF MOVING AIR SUPPORTER OF CONDENSES ON
GASES COMBUSTION WIND SHIELD OF
CAUSES AIR CARS
DOES NOT POLLUTION GET TRAPPED
SUPPORT BY THE HAIR THIN BLANKET
COMBUSTION IN THE NOSE OF AIR AROUND
EARTH

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ARYAN AND HIS MOTHER ARE WALKING ON THE TERRACE
Mummy today I learnt
interesting facts about
air.
But I am just
wondering if there’s
any place which
exists without
oxygen?

Well Aryan, actually
such places do exist.

Which are those
places?

The planets Venus, Mars, Jupiter,
Saturn, Uranus, and Neptune have
significant atmosphere, but oxygen
is not present there for life to exist.

Oh! That’s why Yes dear.

astronauts need to
carry oxygen
cylinders with them
when they go to
space.

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Mummy my teacher told us that Look Aryan we have tulsi,
plants release oxygen into the aloe vera, snake plant and
atmosphere. Does that mean that money plant on our terrace.
planets other than Earth do not
have plants?

You are right Aryan!
Presence of oxygen in air on
Earth is due to plants and
trees.

So mummy are they Do they release
producing oxygen right oxygen
now also? throughout the
day and night?

Yes Aryan.

No Aryan. They only release oxygen So this is the reason
during the daytime. At night, they why you told me that it
release carbon dioxide because of is not advisable to
respiration like all other living beings. sleep under a tree at
night.

Very good
Aryan.

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Next day in school.. Yes, sure. Even I
want to research
Jai and Vanshika, now that I more about air.
have explored about air, can we
take it as our science project?

Just then Ms. Sharma enters the Ma’am, we have
classroom. planned to take ‘Air’
as the topic for our
project.

Ok Vanshika. Ma’am, can you
please tell us about
the composition of
air.

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Though there may be some
variations in the composition
of air from place to place, we
can see that air is mostly
composed of nitrogen and
oxygen.

In fact, these two gases together make up
99% of the air. The remaining 1% is
constituted by carbon dioxide and a few
other gases and water vapour.

Thank you ma’am.

All the best my dear
students for your
project.

Children go back home happy and excited.

THE END

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TEST YOUR KNOWLEDGE

I) Choose the correct answer:

1) Percentage of which gas is maximum in the air?
a)Nitrogen b) Oxygen
c) Carbon dioxide d) Water Vapour

2) Which of these gases support combustion?
a) Oxygen b) Nitrogen
c) Carbon dioxide d) All of the above.

3) The gas produced by plants during respiration is _____.

a) oxygen b) nitrogen
c) carbon dioxide d) argon

II) FILL IN THE BLANKS:

1) Air in motion is called_________.

2) The burning of fuel produces carbon dioxide and
______.

III) DEFINE THE FOLLOWING:

a)Smoke

b)Atmosphere

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SOLUTIONS

Word Scramble

.

1. RAI AIR
2. LSNURITG RUSTLING
3. LUTEFTR FLUTTER
4. DWIN WIND
5. IFRKI FIRKI
6. WEETHAR WEATHER
7. ECSAP SPACE

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MATCH UP

TEXT IMAGE

I TELL THE DIRECTION OF
WIND.

I AM PRODUCED BY THE
BURNING OF FUEL AND
DRY LEAVES.

I AM FORMED WHEN
WATER VAPOUR
CONDENSES ON A COOL
SURFACE.
MY ENTRY INTO THE
LUNGS IS PREVENTED BY
THE FINE HAIR AND
MUCUS PRESENT INSIDE
THE NOSE.
I AM AN IMPORTANT
PART OF THE KIT CARRIED
BY MOUNTAINEERS.

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WORD SEARCH

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TRIVIA TIME

MULTIPLE CHOICE QUESTIONS
1-d) Air is present everywhere but not in soil
2-c) Ceiling fan

MATCH THE FOLLOWING
(a)-iv
(b)-iii
(c )-v
(d)-i
(e)-ii

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TEST YOUR KNOWLEDGE
Choose the correct answer:
1-a) Nitrogen
2-b) Oxygen
3-c) carbon dioxide

FILL IN THE BLANKS:
1-wind
2-smoke

DEFINE THE FOLLOWING:
a) Smoke- Smoke is a pollutant of air
which is produced during burning of a
substance.
b) Atmosphere-The envelope of air
surrounding the earth is called
atmosphere.

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GLOSSARY

Air-Air is a mixture of gases like oxygen, nitrogen, carbon
dioxide, smoke and dust particles.

Wind-Moving air is called wind.

Atmosphere- A layer of air that surrounds the earth.

Carbon dioxide- A heavy colourless gas that is formed by
burning fuels, it also extinguishes fire.

Combustion- the chemical process that happens during the
burning of substances in the presence of oxygen is called
combustion and it gives off heat.

Oxygen-An essential component of air needed by all living
beings to breathe.

Nitrogen-A gas which does not support combustion.

Smoke- Smoke is a pollutant of air which is produced
during burning of a substance.

Respiration- During respiration, living organisms breathe in
oxygen. It is used by the cells of the body to break down
the food and release energy.

Windmill- A structure with large blades on the outside
which, when turned by the force of the wind, helps to
generate electricity.

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BIBLIOGRAPHY

NCERT Science textbook for class VI
Chapter – Air Around Us
IT tools used:
❖MS PowerPoint
❖Autodesk Sketchbook version 8.7.1

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Director Principal’s Message

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