WATER: A NATURAL RESOURCE 

Hello reader, in this article we are going to study about following topics :-

• Water -a renewable Resources 
• Shortage of Water
• How much water is available 
• Forms of water
• Water Cycle  

 WATER –A RENEWABLE RESOURCE

Just have a look at the picture of Earth taken from space .you will find that it appears blue .Nearly 3/4^th of the Earth‘s surface is covered with water .Water is found in the seas, rivers, oceans lakes and ponds. Under the ground, it is found in empty space between rocks A large quantity of water is present in glaciers and polar ice caps in the frozen from. It is also present in                                                 atmosphere in from of water vapour.

 

Water is essential for life. All plants and animal need water to perform many activities like:

·        Various processes in our body such as, digestion of food, absorption of nutrients by the body or getting rid of body wastes, need water.

·        2/3rd of the human body is water.

·        We drink water to maintain the body temperature. When this water evaporates from the surface of body as sweat, it takes away heat from the body and gives cooling effect.

·        In plants, water is essential for germination of seeds, growth and photosynthesis. It also helps in transporting nutrients from t he soil and the food from the soil and the food from leaves to different parts of the plants.

·        Water is used for cooking, washing clothes and also for generating electricity.

·        It is also used in agriculture and industries.

·        It is also used as a medium of transport.

·        Water is a habitat for many plants and animals.

 

SHORTAGE OF WATER

Water is a natural and renewable resources, still we face shortage of water. That is why; your parents and teachers advise you not to waste water.

 The amount of water recommended by the United nation for drinking, washing, cooking and maintaining proper hygiene is a minimum of 50 liter per person per day. However, millions of people in our country and in several other Countries do not get  enough water.

 We are facing shortage of water as distribution of water on the earth is not even. In some places like north-west India. There is an acute shortage of water. On the other hand, north –east India gets so much water as rain that there are floods almost every year.

 HOW MUCH WATER IS AVAILABLE?

 Through about 70% of the Earth’s surface is covered with water, yet, much of it is not in a usable form.

 

·  About 97.4% of the available water is found in seas and oceans and cannot be used by us because of its high salt content.

·        2% of water is frozen in glaciers and in the polar ice caps. That is fresh water, but it is not available to us.

·        So, only 0.6% of water is available for us as fresh water. But, out of this, 0.59% is present as ground water and only 0.01% is available as fresh water on the surface of the earth.

 

Look an activity to know the availability of water

Steps	Assumption	Steps	Assumption
(i). Take a medium size bucket. Fill it with water	Imagine that this water represents total water present on the earth.	(ii). Take a teaspoon of about 5 ml capacity and transfer 100 spoons of water from the bucket to a mug.	Assume that, this represents total fresh water on the earth.
(iii). Now, from the mug transfer 30 spoons of water to a glass.	This represents usable water present as ground water.	(iv). Finally, take out 1/4th spoonful of water from the mug.	This represents all the water presents in all the lakes and rivers of the world.

 

The water that is left behind in the bucket represents the saline water presents in the seas and oceans.

The water left in the mug represents the water present in the frozen from in glaciers and polar ice caps.

 FORMS OF WATER

We know water can be found in three states, i.e. solid, liquid, and gas. Ice, water and steam are the three states of water.

The solid form, snow and ice is found in glaciers and ice caps on the poles. Liquid form of water is present in ocean, lakes, rivers, and as underground sources. The gaseous form is the water vapour present in the atmosphere.

The state of water can be changed by heating or cooling:

When ice is heated it change into water.

When water is heated. It change into vapour

When the water vapour cools down, it changes into water.

When water is cooled, it change into ice.

 WATER CYCLE

We have studied the water cycle in class 6. The water in Seas, rivers, ponds or streams evaporate because of the heat of the sun, This water vapour rises up. High in the atmosphere, the vapour cools down to form drops of water. These drops of water combine together to form clouds.

 

 When clouds become too heavy, they fall on the Earth as rain. In colder regions, the water may fall as hail or snow. The rainwater then drains into rivers and streams or seep through the soil to form ground water.

This water again evaporates and the water cycle in nature goes on.

 

Final Thought :-

So, friends today in this article we learn many topics like :- Water -a renewable Resources,  Shortage of Water, How much water is available on the earth, Forms of water, Water Cycle. if you think this article is nice then you can also share on social media with your friends.