Forms of water

This PPT is about Forms of Water. It gives details about Forms of water and all details.

1. Water Forms

2. What is Water? Definition: A colourless , transparent, odourless , liquid which forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms .  If earth’s map is observed keenly, it is found that most of the area is blue in color, indicating the presence of water . About 71% of earth’s surface is covered with water. Water is present in oceans, seas, lakes, rivers, ice caps, as ground water and in the atmosphere.

3. Portion of Water on Earth

4. Forms of Water Forms of Water: Water is being continuously used and water conservation is the major concern in the present scenario . Water cycle has helped in maintaining water on the surface of earth for millions of years.   The water circulated in water cycle takes three different forms –  Solid Liquid G as

5. Forms of Water (Conti…) The solid form of water – ice, is found at the poles of the earth, the snow covered mountains and the glaciers . Liquid form is present in the rivers, lakes , seas and oceans . The gaseous form of water, water vapour is present all around us .

6. Solid Water Form Solid Water: When water freezes, its molecules move further apart, making ice less dense than water . Water freezes at 0° Celsius, 32° Fahrenheit . Celsius is scale that measures temperature . This means that ice will be lighter than the same volume of water, and so ice will float in water . Ice, snow, icicles , ice on a skating rink and frost are examples of water in the solid state.

7. Solid Water Form (Conti…)

8. Liquid Water Form Liquid Water: Liquid water  is wet and fluid . We use liquid water in many ways, including washing and drinking . Pure liquid water is free of salt, rocks, soil, and garbage . The formation of hydrogen bonds is an important quality of liquid water that is crucial to life.  In liquid water, hydrogen bonds are constantly formed and broken as the water molecules slide past each other . The breaking of these bonds is caused by the motion (kinetic energy) of the water molecules due to the heat contained in the system. 

9. Liquid Water Form (Conti…)

10. Gas Water Form Gas Water: V apor is always present in the air around us. You cannot see it . When you boil water, the water changes from a liquid to a gas or water vapor . As some of the water vapor cools, we see it as a small cloud called steam. This cloud of steam is a miniversion of the clouds we see in the sky . At sea level, steam is formed at 100° Celsius, 212° Fahrenheit.

11. Gas Water Form (Conti…)

12.   Biological Significance   Biological S ignificance of Ice's A bility to float on water: As water is boiled, kinetic energy  causes the  hydrogen bonds  to break completely and allows water  molecules  to escape into the air as gas (steam or water vapor ). When water freezes, water molecules form a crystalline structure maintained by hydrogen bonding. Solid water, or ice, is less dense than liquid water. Ice is less dense than water because the orientation of hydrogen bonds causes molecules to push farther apart, which lowers the  density.

13.  Biological Significance (Conti…) For other liquids, solidification when the temperature drops includes the lowering of kinetic energy, which allows molecules to pack more tightly and makes the solid denser than its liquid form. Because ice is less dense than water, it is able to float at the surface of water.

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