The document discusses the structure of the atmosphere and composition of air. It is divided into four main layers: the troposphere, which is closest to Earth's surface; the stratosphere, which facilitates visibility and flight; the mesosphere, containing the ozone layer; and the thermosphere, containing ionic particles. The composition of air is also discussed, noting that nitrogen, oxygen, and carbon dioxide are the main components, with increasing carbon dioxide levels a concern. Weather monitoring instruments like anemometers, barometers, psychrometers, and rain gauges are also summarized.

1. STRUCTURE OF THE ATMOSPHERE
TROPOSPHERE: THIS IS THE
PORTION WE LIVE IN AND IS
, THEREFORE , MOST FAMILIAR
TO US . IN THE TROPOSPHERE
, ON AN AVERAGE , THE
TEMPREATURE DECREASES AT
RATE OF 1C WITH EVERY 165m
ASCEND.
STRATOSPHERE: IT PROVIDES
VISIBILITY AT ITS FINEST .
AIRCRAFT FLY THROUGH THIS
LAYER BECOUSE IT FACILITATES
VISIBILITY AND EASIEST FLY
CONDITIONS.

2. STRUCTURE OF THE ATMOSPHERE
MESOSPHERE: THIS
LAYER CONTAINS OZONE
LAYER . WHICH IS AN
IMPORTANT PART OF LAYERS
OF ATMOSPHERE.
THERMOSPHERE : IN
THE LOWER PART OF THIS
LAYER , ION – PARTICLES ARE
PRESENT WHICH ARE
ELECTRICALLY CHARGED
AND PLAY AN IMPORTANT
ROLE IN OUR WIRELESS
COMMUNICATION.

3. AIR AND ITS COMPOSITION
COMPOSITION OF AIR
NITROGEN : IS INDIRECTLY
USEFUL TO US . PLANTS ABSORB
NITROGEN THROUGH SOIL FOR
THEIR GROWTH AND
DEVELOPMENT.
OXYGEN: OXYGEN IS KNOWN AS
LIFE SUPPORTING GAS .
CARBON DIOXIDE : IT IS ABSORB
BY THE PLANTS AND RELEASE BY
THE HUMAN BEINGS AND ANIMALS.
WARNING: INCREASE IN CARBON
DIOXIDE IN ATMOSPHERE IS
SERIOUS CONCERN FOR
ATMOSPHERE.

4. OZONE HOLE
SERIOUS CONCERN
FOR US AS, THE
PICTURE DEPICTS
OZONE HOLE WHICH
TELLS US HOW WE
ARE CARING FOR OUR
MOTHER EARTH ?
CAUSES:
1.DEFORESTATION
2. URBANISATION
3. POLLUTION
4. WASTAGE O F
RESOURCES
5. IMMORAL ATTITUDE

5. POLLUTANTS IN THE AIR
POLLUTANTS LIKE CARBON
MONO-OXIDE ,
SULPHUR DIOXIDE AND LEAD
PARTICLES ARE THE MAIN CAUSES
OF SERIOUS THREATS FOR
ENVIORNMENT AND HUMAN
BEINGS .
SMOG: THE SMOKE PARTICLES
WHEN COMBINED WITH FOG FORM
SMOG.
DISEASES: THE ABOVE PARTICLES
CAUSE DISEASES LIKE IRRITATION IN
EYES , SKIN DISEASE , RESPIRATORY
DISEASES.

6. POLLUTANTS IN THE AIR
IN COMPARISON
DEVELOPED
COUNTRIES CAUSE
MORE POLLUTIONS
THAN DEVELOPING
COUNTRIES. FOR
FURTHER
INFORMATION
STUDY KYTO
PROTOCAL OF
UNITED NATIONS.

7. DEVICE TO MEASURE AIR PRESSURE
THE DEVICE IS AN
ANEMOMETRE.
IT IS USED TO
MEASURE WIND
SPEED AND IS A
COMMON WEATHER
STATION
INSTRUMENT.

8. DEVICE TO MEASURE AIR PRESSURE
THE DEVICE IS
BAROMETER. THE
DEVICE IS USED
ESPECIALLY FOR
MEASURING AIR
PRESSURE.

9. DEVICE TO MEASURE AIR PREASSURE
THE DEVICE IS
PSYCHOMETER. THE DEVICE
IS TO MEASURE HUMIDITY.

10. DEVICE TO MEASURE RAINFALL
THE DEVICE
IS
RAINGAUGE.

11. DEVICE TO MEASURE RAINFALL
THE DEVICE IS
THERMOMETER.AS
WE KNOW
THERMOMER IS TO
MEASURE BODY
TEMPREATURE
OVEN OR FOOD
TEMPREATURE. IT
ALSO USED FOR AIR
TEMPREATURE.

12. MECHANISM OF RAINFALL
AS THE HOT AIR RISES ,IT REACHES
HIGH IN THE ATMOSPHERE WHERE
IT COOLS DOWN DUE TO THE
PRESENCE OF LOW
TEMPREATURE.
THE WATER VAPOURS IN THE AIR
CONDENSES INTO TINY DROPLETS
AND JOIN TOGETHER AND FORM
CLOUDS . DUE TO FURTHER
COOLING THEY BECOME LARGER
DROPLETS .HENCE THEY
FALLDOWN AS RAINFALL OR
SNOW.

13. MONITORING WEATHER CONDITIONS
MONITORING WEATHER
IS VERY HELPFUL IN
FORECASTING OF
TEMPREATURE
,HUMIDITY RAINFALL ,
WIND VELOCITY ,
SUNRISE AND SUNSET.