2nd Standard: Air and Water (Environmental Science, EVS)


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Air and Water
Moving Air, Wind,
Types if Wind,
Forms of Water,
Freshwater and Salt Water
Uses of Water
Solubility of Water

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2nd Standard: Air and Water (Environmental Science, EVS)

  1. 1. EVS :Air and Water Class - II
  2. 2. Air
  3. 3. Air Air is one of the natural resource from the environment. No one can see or touch air but it is always around us. Humans, Animals and Plants need Air to breath. When Air moves it is called as Wind. We feel air only when it moves. Wind is classified based on it’s speeds. Sometimes it can be gentle or strong also. theeducationdesk.com
  4. 4. Breeze: A gentle Wind Gently or slowly moving air is called as Breeze. We feel very pleasant with the breezing air. theeducationdesk.com
  5. 5. Gale: Strong Wind Wind blowing fast and slightly strong is called as Gale. It can move the leaves and branches of tress. theeducationdesk.com
  6. 6. Storm: Very Strong Wind Very strong wind with rain or snow, is called as Storm. theeducationdesk.com
  7. 7. Hurricane: Very severe Storm theeducationdesk.com
  8. 8. Effects of Storm Uprooted Tree Washed away farms Flooded Land Destroyed Houses theeducationdesk.com
  9. 9. Use of Wind Wind helps to move the sail boat. Wind moves the fan of the windmill Sail Boat Windmill theeducationdesk.com
  10. 10. On windy day kids can fly Kites. Wet clothes dry fast in windy air Flying kite Drying clothes theeducationdesk.com
  11. 11. Water
  12. 12. Forms of water Cleaning Of water Fresh water Water Things mix or doesn’t mix Salt water Uses of water theeducationdesk.com
  13. 13. Water Water is one of the natural resource. Humans, Animals and plants need water to drink and live. Water has no fixed shape. Water covers 71% of the Earth’s surface. theeducationdesk.com
  14. 14. Form of Water – Solid Ice is the solid form of water. When water temperature is very low then it freezes and Ice is formed. Ice Frozen seawater theeducationdesk.com
  15. 15. Form of Water - Liquid Liquid form of water is Water. Water Water theeducationdesk.com
  16. 16. Form of water - Gas Steam or Water vapor is the gas form of water. Water is converted into steam when heated. Cloud are formed by water vapor. Water Vapor or Steam Clouds theeducationdesk.com
  17. 17. Saltwater Saltwater contains high amount of salt. It covers major part of Earth. Sea / Ocean Lagoon theeducationdesk.com
  18. 18. Fresh water Fresh water has low concentration of dissolved salts. It can be used for drinking. It covers a very small part of earth. (less than 2%) Lake River theeducationdesk.com
  19. 19. Sources of Fresh Water Pond Ground water Glacier Spring theeducationdesk.com
  20. 20. Fresh water at Home Hand pump Well Water Tap Water Can theeducationdesk.com
  21. 21. Uses of Water For Drinking In Industries For Agriculture Transportation theeducationdesk.com
  22. 22. Uses of Water at Home Cooking Cleaning Bathing Toilets theeducationdesk.com
  23. 23. More uses of Water at Home Watering Plants Washing Clothes Car wash Washing Vegetables theeducationdesk.com
  24. 24. Water: Fun Activities Swimming Water Parks Rafting Boat Racing theeducationdesk.com
  25. 25. Water Attributes Water is a universal solvent because many things can be mixed in water Things which doesn’t dissolve in water are Oil, Stones, etc. Things Mix In Water Sugar Salt Color Lemon Sand Wax Oil Stones Things Does not mix in water theeducationdesk.com
  26. 26. Clean water and Dirty water The water that is used to drink should be clean. Dirty water has germs that can make us fall sick. Dirty water Clean water theeducationdesk.com
  27. 27. Water Purification at Home Boiling kills all types of germs. Water filters removed various types of impurities from water. Boiling Water filter theeducationdesk.com
  28. 28. Water Storage at Home After boiling or filtering, store the clean water in closed and clean containers. Prevent it from getting dirty. Water storage Water storage theeducationdesk.com
  29. 29. Glossary: Dissolve - To Mix Germs - Small living things that can make us sick Purify - To Clean Solvent Thank You !!! http://theeducationdesk.com theeducationdesk.com