Flashcards
WATER
Cards in this deck (13)
- 1WATERIt is compound made up of two atoms of hydrogen and one atom of oxygen.
It is represented as H2O. - 2OCCURRENCE OF WATEROn earth's surface
In the atmosphere
In living organisms - 3SOURCES OF WATERSurface water : River, Lake, Ocean, sea water
Underground water : Well and spring water
Above surface water : Rain water, water vapour. - 4THREE STATES OF WATERSolid : Ice
Liquid : Water
Gaseous : Water vapour - 5Water cycleThe interconversion of three states of water occurring in nature is called as water cycle.
- 6PROPERTIES OF WATERWater as a universal solvent.
Solute : substance which dissolves in a medium
Solvent : medium in which solute dissolves
Solution : Solute + Solvent - 7ANOMALOUS BEHAVIOUR OF WATERA unusual property of water which enables aquatic plants and animals to survive in colder region of the world as it freezes on top and remains liquid below ice layer.
- 8IMPORTANCE OF WATER1. Biological need
2. Acts as a solvent
3. essential for agricultural crops, plants
4. control's earth's climate
5. Domestic purposes
6. Generation of electricity - 9WATER POLLUTIONUndesirable changes in properties of water that make it unfit for human consumption.
Pollutants : substances polluting water - 10WATER BORNE DISEASESCholera, Typhoid , Diarrhea, Jaundice
- 11POTABLE WATERWater fit for drinking purpose is called as potable water.
- 12PURIFICATION OF WATER1. Boiling
2. Filtration
3. Water purifiers
Use of alum. - 13CONSERVATION OF WATER22nd March is celebrated as world water day every year to attract public attention towards need to conserve water.
Amount of water recommended by UN for drinking, washing, cooking is minimum of 50 litres per person per day.
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- Priyanka Gandhi
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