n atural phenomena
Post on 12-Jun-2015
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NATURAL RESOURCES
LAND,AIR,WATER ARE ALL PROVIDED BY NATURE ARE CALLED NATURAL RESOURCES….
ABOUT ??
HYDROSPHERE: THE LIQUID PART OF EARTH COMPRISING WATER IS CALLED HYDROSPHERE.
LITHOSPHERE: THE OUTER CRUST OF EARTH COMPRISING LAND IS CALLED LITHOSPHERE.
ATMOSPHERE: THE AIR ACTING LIKE BLANKET FOR THE WHOLE EARTH IS CALLED ATMOSPHERE.
BIOSPHERE: THE LIFE ZONE WHERE ATMOSPHERE, HYDROSPHERE AND LITHOSPHERE INTERACT IS CALLED BIOSPHERE.
Zones of earth
CAUSES :-• UNEVEN HEATING OF THE EARTH• ROTATION OF THE EARTH• PRESENCE OF MOUNTAIN RANGES
MOVEMENT OF AIR : WIND
THE MOVEMENT OF AIR FROM ONE REGION TO OTHER CREATES WIND…..
LAND BREEZE / SEA BREEZE
AIR POLLUTION
AN INCREASE IN THE CONTENT OF THE HARMFUL SUBSTANCES IN AIR……
EFFECTS IT LEADS TO MANY RESPIRAT-ORY PROBLEMS IT LEADS TO ACID RAIN.
ACID RAIN
When the unburnt carbon particles, nitrogen oxide and sulphur oxide get dissolved in rain water, it gives rise to acid rain.
WATER POLLUTION ?????
“THE ADDITION OF UNDESIRABLE SUBSTANCES TO WATER IS CALEED
WATER POLLUTION”
WATER
POLLUT ION
MAIN PROBLEMS OF POLLUTION IN THE COUNTRY THAT NEED TO BE ADDRESSED ARE :-
o POLLUTION FROM DOMESTIC SEWAGE
o HIGH RATES OF DRINKING WATER AND DRAINAGE
GENERAL LACK OF SEWAGE TREATMENT PLANTS
SOIL FORMATION :-THE SUN : THE ROCKS EXPAND DURING DAY DUE TO HEATING BY SUN , AT NIGHT THE CONTRACT BY COOLING AT NIGHT. DUE TO THIS EXPANSION AND CONTRACTION ROCKS BREAK INTO SMALLER PIECES.
WATER :• WHEN WATER GET INTO CRACKS FORMED DUE TO UNEVEN HEATING.IF THIS WATER LATER FREEZES, IT CAUSE CRACKS TO WIDEN AND THE ROCKS BREAK.• FLOWING WATER WEARS AWAY EVEN HARD ROCKSOVER LONG PERIODS OF TIMETHE ROCKS RUB AGAINST EACH OTHER AND IT RESULTS IN ABRASION OF ROCKS INTO SMALLER PIECES.
• WIND: WIND ERODES THE SMALLER ROCKS JUST LIKE WATER AND THEY FORM SMALL PARTICLE, SOIL.
• LICHENS GROW ON THE SURFACE OF ROCKS AND EXCRETE A SUBSTANCE THAT CAUSE ROCK SURFACE TO POWDER DOWN AND WHEN PLANTS GROW ON ROCKS THE ROOTS FORM CRACKS AND LATER BREAK DOWN.
NITROGEN IN ATMOSPHERE
NITROGEN FIXATION
PROTOPLASM(GREEN PLANTS)
NITRATES
PROTOPLASM
(ANIMALS)
AMMONIA NITRIFICATION
ATMOSPHERIC AND INDUSTRIAL FIXATION
NITRITES
NITRIFICATION
DENITRIFICATION
Nitrogen cycle
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