1.
WATER A PRECIOUS RESOURCE PRESENTED BY TGT (SCIENCE), K V .DHARWAD CLASS VII

2.
THREE DIFFERENT STATES OF WATER <ul><li>1. SOLID FORM OF WATER - ICE / SNOW </li></ul><ul><li>PRESENT AS ICE CAPS </li></ul><ul><li>AT THE POLES OF THE EARTH </li></ul><ul><li>SNOW COVERED MOUNTAINS </li></ul><ul><li>AND GLACIERS </li></ul>

3.
2. LIQUID FORM - WATER <ul><li>PRESENT IN </li></ul><ul><li>OCEANS </li></ul><ul><li>LAKES </li></ul><ul><li>RIVERS & </li></ul><ul><li>UNDERGROUND </li></ul>

4.
3.GASEOUS FORM - WATER VAPOUR <ul><li>PRESENT IN AIR AROUND US </li></ul>

5.
Cycling of water in nature <ul><li>Basic processes in water cycle </li></ul><ul><li>EVAPORATION - </li></ul><ul><li>conversion of </li></ul><ul><li>LIQUID TO GAS </li></ul><ul><li>by heating </li></ul><ul><li>CONDENSATION </li></ul><ul><li>Conversion of </li></ul><ul><li>GAS TO LIQUID </li></ul><ul><li>by cooling </li></ul><ul><li>GAS [VAPOUR ] </li></ul><ul><li>LIQUID [WATER] </li></ul>evaporation condensation heating cooling

6.
WATER CYCLE

7.
The process of seeping of water into the ground-INFILTRATION RAIN WATER SURFACE RUN OFF INFILTRATION SOIL WATER GROUND WATER

8.
<ul><li>THE UPPER LIMIT OFSATURATED ZONE OF GROUND WATER — WATER TABLE </li></ul>WATER TABLE

9.
UNSATURATED ZONE SATURATED ZONE AQUIFER WATER TABLE GROUND WATER THE GROUND WATER STORED BETWEEN THE LAYERES OF HARD ROCKS BELOW THE WATER TABLE -- AQUIFER

10.
Ground water is an important source of water

11.
DEPLETION OF WATER TABLE <ul><li>Water table may go down </li></ul><ul><li>if the water is not sufficiently replenished. </li></ul>infiltration Consumption of ground water Ground water

12.
REASONS OF DEPLETION OF WATER TABLE <ul><li>1. DEFORESTATION </li></ul>

13.
2 . SCANTY RAINFALL

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3.EXCESSIVE CONSUMPTION BY INCREASING POPULATION

15.
<ul><li>DECREASE IN THE SEEPAGE AREA </li></ul>

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5. EXCESSIVE USE BY Agricultural activities

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6. INCREASING INDUSTRIES

18.
CONSERVATION OF WATER <ul><li>AVOID WASTAGE </li></ul>

19.
CONSERVATION OF WATER <ul><li>REPAIR LEAKING TAP </li></ul>

20.
CONSERVATION OF WATER <ul><li>USE MINIMUM </li></ul>

21.
CONSERVATION OF WATER <ul><li>REUSE /RECYCLE </li></ul><ul><li>IF POSSIBLE </li></ul>

22.
WATER WISE HABITS <ul><li>DIRECT </li></ul><ul><li>USED </li></ul><ul><li>KITCHEN WATER </li></ul><ul><li>TO </li></ul><ul><li>YOUR GARDEN . </li></ul>

23.
Drip irrigation for your garden

24.
WATER WISE HABITS <ul><li>WASH VESSELS USING COLLECTED WATER </li></ul><ul><li>INSTEAD OF WASHING DIRECTLY UNDER TAP. </li></ul>

25.
WATER WISE HABITS <ul><li>MOP THE FLOOR INSTEAD OF WASHING </li></ul>

26.
WATER WISE HABITS <ul><li>TURN OFF TAP WHILE BRUSHING </li></ul>

27.
RAINWATER HARVESTING <ul><li>BASIC PRINCIPLE- </li></ul><ul><li>REDUCE THE SPEED </li></ul><ul><li>MAKE </li></ul><ul><li>RUNNING WATER </li></ul><ul><li>WALK ! </li></ul><ul><li>MAKE </li></ul><ul><li>WALKING WATER </li></ul><ul><li>CRAWL !! </li></ul><ul><li>MAKE </li></ul><ul><li>CRAWLING WATER </li></ul><ul><li>STAND !!! </li></ul><ul><li>ALLOW THE STANDINGWATER TO </li></ul><ul><li>PERCOLATE !!!! </li></ul>STOP!

29.
WATER PERCOLATION SURFACE RUN OFF

30.
PLANTING VEGETATION

31.
ROOF TOP RAINWATER HARVESTING <ul><li>RAINWATER IS COLLECTED FROM THE ROOF OF BUILDINGS AND STORED IN TANKS AFTER FILTRATION . </li></ul>

32.
Roof top rainwater harvesting

33.
Roof to rainwater harvesting

34.
BAWRI- A TRADITIONAL WAY OF COLLECTING WATER

35.
INFILTRATION PITS <ul><li>IT SOAKS WATER & DIRECT IT TO UNDER GROUND TO RECHARGE GROUND WATER </li></ul>Pit filled with gravel

36.
GRASSY PATCHES & OTHER VEGETATIONS <ul><li>HELPS IN INFILTRATION </li></ul>

37.
DRIP IRRIGATION - saves water <ul><li>A TECHNIQUE OF WATERING PLANTS BY USING NARROW TUBES WHICH SUPPLY WATER AT THE BASE OF PLANTS AS TINY DROPS. </li></ul>

38.
DRIP IRRIGATION

40.
Save every drop of water !

41.
SAVE WATER ! SAVE LIFE !

42.
SAVE WATER ! SAVE LIFE !

43.
LABEL THE DIAGRAM SUN’S HEAT CLOUDS WATER BODY EVAPORATION CONDENSATION RAIN FALL 6

44.
FILL IN THE BLANKS <ul><li>1.The solid form of water is ---------------- </li></ul><ul><li>2. the process of changing water to water vapour is called ----------------. </li></ul><ul><li>3. The process of recharging ground water can be done by ---------------------. </li></ul><ul><li>4.The source of water for bore well is ----------- </li></ul><ul><li>5.Amethod of irrigation which saves good amount of water is ------------------ </li></ul><ul><li>6. One reason for depletion of ground water is </li></ul><ul><li>is ---------------- </li></ul>ICE EVAPORATION rainwater harvesting ground water drip irrigation increase in population

45.
MATCH THE FOLLOWING <ul><li>CIRCULATION OF WATER IN NATURE </li></ul><ul><li>INFILTRATION PITS </li></ul><ul><li>WATER SAVING METHOD OF IRRIGATION </li></ul><ul><li>A METHOD OF STORING RAINWATER FOR FUTURE USE </li></ul><ul><li>CAUSE OF WATER SHORTAGE </li></ul><ul><li>DEFORESTATION </li></ul><ul><li>WATER CYCLE </li></ul><ul><li>ROOF TOP RAINWATER HARVESTING </li></ul><ul><li>DRIP IRRIGATION </li></ul><ul><li>REPLENISH ground WATER </li></ul>

47.
THANK YOU