Online CBSE class 6 science - Chapter 11 – Water

Online CBSE class 6 science - Chapter 11 – Water

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We cannot imagine our life without water as we all drink water, and use water for our day to day activities. Let’s understand more about water.

HOW DO WE USE WATER?

• We need water for drinking, bathing, cooking food and washing our clothes and utensils.
• Agriculture requires a large amount of water for growing crops.
• All kind of animals needs water for their survival.
• For big and small factories required water for producing a verity of goods needed in daily life.

Once we use water for some given activity, we do not use it again and let it flow through the drain as waste or dirty water. For doing the same activity we required daily basis clean and fresh water.

Watch and learn water and its sources with animated videos of Class 6th Science.

Have you ever thought from where this freshwater comes?

Oceans as the Major Source of Water

The Oceans and seas cover ¾ Surface of the Earth. The Sea Water is salty and is unfit for drinking or agriculture activities. In spite of its drawbacks oceans is the major source of fresh water. How?

• The process due to which water changes into its vapor from its exposed surface is called evaporation.
• The factors which increase the rate of evaporation are:

i.The higher temperature of the air.

ii.Movement in the air.

iii.The larger area of the exposed surface.

During the daytime when the sun shines over oceans, seas, rivers, lakes, fields, cities, towns, and the heat from it evaporate vast amount of water. The water vapor so formed mixes in the air. Thus, day-in and day-out water vapor continuously enters in the air.

There is another way by which large amounts of water vapor are added to the air it is done through Plants.

Read complete chapter click Online CBSE class 6 science - Chapter 11 – Water

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