I Spell SSt inservice course KVGN

1. MOISTURE IN THE
ATMOSPHERE
K.SUGUNA.R
PGT GEO

2. EVAPORATION AND
CONDENSATION




EVAPORATION:THE PROCESS OF CHANGING OF WATER INTO
WATERVAPOUR
DUE HEATING OF THE ATMOSPHERE
CONDENSATION:THE PROCESS OF CHANGING OF
WATERVAPOUR INTO WATER
DUE TO COOING OF THE ATMOSPERE

3. HUMIDITY


ABSOLUTE HUMIDITY:ACTUAL AMOUNT OF WATERVAPOUR
PRESENT IN THE ATMOSPHERE
RELATIVE HUMIDITY: RATIO BETWEEN THE AMOUNT OF
WATERVAPOUR PRESENT IN THE ATMOSPHERE AND THE
AMOUNT OF WATER VAPOUR IT CAN HOLD AT A PARTICULAR
PARTICULAR TEMPERATURE

4. FORMS OF CONDENSATION
 DEW
 FROST
 FOG
AND MIST
 CLOUDS

5. DEW





MOSTURE DEPOSITED IN THE FORM OF WATER
DROPLETS ON
STONES
GRASS BLADES
PLANT LEAVES
IDEAL CONDITIONS- CLEAR SKY,CALM AIR,HIGH
RELATIVE HUMIDITY,COLD AND LONG NIGHTS.

6. FROST




MOISTURE DEPOSITED IN THE FORM OF ICE CRYSTALS.
WHEN CONDENSATION TAKES PLACE BELOW FREEZING
POINT.
IDEAL CONDITIONS- CLEAR SKY,CALM AIR,HIGH
RELATIVE HUMIDITY,COLD AND LONG NIGHTS.
AIR TEMPERATURE BELOW THE FREEZING POINT.

7. FOG AND MIST



FOG IS A CLOUD WITH ITS BASE NEAR TO THE GROUND.
MIST FORMS WHEN THE RISING WARM AIR UP THE
SLOPES MEETS A COLD SURFACE.
THE ONLY DIFFERENCE BETWEEN MIST AND FOG IS THAT
MIST CONTAINS MORE MOISTURE THAN THE FOG.

8. CLOUDS



CLOUD IS A MASS OF MINUTE WATER DROPLETS
FORMED BY CONDENSATION OF WATERVAPOUR IN FREE AIR
AT CONSIDERABLE ELEVATION.

9. PRECIPITATION
 THE
FALLING OF WATER THROUGH THE
ATMOSPHERE TO THE EARTH SURFACE

10. FORMS OF PRECIPITATION
 RAIN
FALL
 SNOW FALL
 SLEET
 HAIL STONE

11. RAINFALL
 THE
PRECIPITATION IN THE FORM OF
WATER
 CONDENSATION TAKES PLACE ABOVE
FREEZING POINT

12. SNOW FALL




THE PRECIPITATION IN THE FORM OF FINE FLAKES OF
SNOW
CONDENSATION TAKES PLACE BELOW FREEZING
FREEZING POINT
MOISTURE IS RELEASED IN THE FORM OF HEXAGONAL
CRYSTALS
THESE CRYSTALS FORM FLAKES OF SNOW

13. SLEET




FROZEN RAINDROPS AND REFROZEN MELTED SNOW WATER
WARM LAYER OF AIR LIES ABOVE COLD LAYER
RAIN DROPS WHICH LEAVE THE WARM LAYER ENCOUNTER THE COLD
AIR BELOW.
AS A RESULT THEY SOLIDIFY AND REACH THE GROUND AS SMALL
PELLETS OF ICE NOT BIGGER THAN THE RAIN DROPS FROM WHICH
THEY ARE FORMED

14. HAILSTONE



DROPS OF RAIN AFTER BEING RELEASED BY THE CLOUDS BECOME
SOLIDIFIED INTO SMALL ROUNDED SOLID PIECES OF ICE
FALLING RAINDROPS CARRIED AWAY BY STRONG CONVECTIONAL
CURRENTS
THEY GET COOLED AND SOLIDIFIED AND FALL AS HAILSTONES

15. TYPES OF RAIN
 CONVECTIONAL
RAIN
 OROGRAPHIC RAIN
 CYCLONIC RAIN

16. CONVECTIONAL RAIN



RAIN IS CAUSED BY CONVECTIONAL AIR CURRENTS
COMMON IN EQUATORIAL REGIONS
HEAVY RAIN ASSOCIATED WITH LIGHTNING AND
THUNDER

17. OROGARPHIC RAIN



CAUSED BY RELEIF OR A MOUNTAIN
WINDWARD SIDE RECEIVES MORE RAINFALL
LEEWARDSIDE RECEIVES NO OR LESS RAINFALL

18. CYCLONIC RAIN



CAUSED BY CYCLONE
HEAVY RAIN ALONG THE COASTAL REGIONS
CAUSES DEMAGES TO THE LIFE AND PROPERTIES