Worksheet on importance of water contains various types of questions on different states of water and the process of water cycle.
We know that ice can be changed into liquid and liquid into water vapour. Similarly, water vapour can be changed into liquid and liquid into ice.
I. Fill in the blanks:
(i) ________ is the main source of water.
(ii) We use the ________ form of water for drinking.
(iii) Life is not possible without ________.
(iv) Pure water is ________.
(v) The conversion of water vapour into water drops is called ________.
II. Answer the following questions:
(i) What is the solid state of water? How does water change into the solid form?
(ii) Name the gaseous form of water. How does it form clouds?
(iii) What is water cycle? Explain
(iv) What is the difference between evaporation and condensation?
III. Name them:
(i) The form of water used for drinking, cleaning, washing, etc. ________
(ii) Water in the form of ice ________
(iii) Water in the form of gas ________
(iv) Conversion of water into water vapour ________
(v) Conversion of water vapour into water ________
Check the answers of the worksheet on importance of water:
I. (i) Rain
II. (i) Ice is the solid state of water. When we freeze the water in our refrigerator after sometime the water change into the solid form i.e. ice.
(ii) Water vapour is the gaseous form of water. Small water drops combine together to form clouds.
(iii) The heat of the Sun warms the water in the rivers, ponds, etc., and forms water vapour and the water vapour mixes with the air and goes high up in the atmosphere where the air is cool. In the presence of cool air, it condenses to form small water drops these water drops combine together and form clouds. When these clouds pass through the very cool air then the water drops become big and heavy these heavy and big water drops come on the Earth in the form of rain. Some of the rain water goes under the ground while most of the rain water flows and fills the rivers, ponds, etc. again.
This water again evaporates by the heat of the Sun. It again goes up and rains. This process is known as water cycle.
(iv) The conversion of water into water vapour is called evaporation and the conversion of water vapour into water drops is called condensation.
III. (i) liquid
(iii) water vapour