The continuous movement of water from the surface to clouds and from clouds to the surface is also called as the Hydrologic cycle.The process of the water cycle mainly includes 4 steps they are - Evaporation, Condensation, Precipitation, Runoff and infiltration. Since rain is often erratic, canals also suffer frequently from lack of water. (i) Water cycle. Water Cycle – Essay. Chapter 17 - Forests - Our Lifeline. The areas where the warm and cold currents meet provide the best fishing ground of the world. CBSE Class 7 Science Water A Precious Resource MCQs. It is because industrial effluents and untreated water of industries get mixed into streams and rivers. Air exerts pressure: The fact that Air exerts pressure can be understood by many examples. This can be skillfully used to recharge the groundwater. Answer:  Salinity is the amount of salt in grams present in 1000 grams of water. Why we cannot go to the centre of the earth? These are called potted plants. The water cycle has helped in maintaining water on the surface of the earth for millions of years. The only source of freshwater lies underground because rivers in this area do not have water throughout the year. These tides are called neap tides. Some of the steps which can be taken for the proper management of water are given below: 1. Why the quality of water is deteriorating? Tides are caused due to the strong gravitational pull exerted by the sun and moon on the earth’s surface. The stronger the wind blows, the bigger the wave becomes. For example seas around Japan and the eastern coast of North America. The water table does not get affected as long as we draw the same amount of water as is replenished by natural resources like rain. Courses. The solid form of water – ice, is found at the poles of the earth, the snow covered mountains and the glaciers. Use mug and water in the bucket for bathing instead of using showers. Water Resources in India The water cycle maintains the amount of water on the earth. Condensation is the process of water turning from a gas into a liquid.. You have probably experienced condensation if you have had a cold glass of water at a restaurant. The different resources available on the Earth are land, water and air. However, … Most of us assume that there is plenty of water all over the earth. Groundwater as an Important Source of Water Water is the basic necessity for the survival of all life forms on earth. Rainwater Harvesting The stronger the wind blows, the bigger the wave becomes. To register for our free webinar class with best science tutor in India. The water cycle refers to the continuous movement of water from the sky to the ground and then back again. We can not drink salt water or use it for crops because of the salt content. However, there is a number of factors which cause depletion of water table at a very fast rate which is really a matter of concern for every one of us. Water Cycle. Water is found in gaseous state, liquid state and solid state during water cycle. It’s probably one of the reasons why earth is the only planet that supports life. Aquatic life is too complex. ... liquid state and solid state during water cycle. If any pipeline and tap water is leaking there, immediately report to authorities like ‘JAL BOARD’ (in Delhi) to prevent water loss. Industries also need water for their functioning. Mr. DeMaio and friends learn the essential facts about the water cycle! Without water, we can not think of life. Most of the water used in the industries is drawn from groundwater. The rise and fall of water due to tides is being used to generate electricity in some places. It is the pattern in which the water from oceans, seas, lakes etc gets evaporated and turns to vapour. The water cycle is made up of following processes: Evaporation and Transpiration. It is difficult to move the bicycle against the direction of wind. What is the Water Cycle? Above 0 degrees centigrade, the vapours will condense into water droplets. The sun provides the energy for a continuous exchange of moisture between the oceans, the land and the atmosphere. Today the situation is that inspite of scanty rains those places are managing their water needs well. Leave a comment Next, I show the students a video in order for them to see the water cycle in action. Here we have given NCERT Class 7 Science Notes Chapter 16 Water: A Precious Resource. This makes clouds. The water in these sources is the groundwater. FIBRE TO FABRIC-CLASS 7-CHAPTER 3-SHORT NOTES-SCIENCE. About 71% of surface of the earth is covered with water. It is a universal solvent making it one of the most important resources on planet earth. Therefore, some regions in our country may have floods while others may suffer from droughts at the same time. This enables the fisherman to get a plentiful catch. 5. The stronger the wind blows, the bigger the wave becomes. In our country, farmers depend on rain, canal water or groundwater for irrigation. Then, the water falls from the sky as rain, snow, sleet or hail. A comprehensive database of more than 34 water cycle quizzes online, test your knowledge with water cycle quiz questions. The water cycle is the process by which water continually changes its form and circulates between oceans, atmosphere and land. Of the many processes involved in the water cycle, the most important are evaporation, transpiration, condensation, precipitation, and runoff. Cold current: The Labrador Ocean current. The air from the sea is called the … Water is being used injudiciously. Answer: On the occasion of World Water Day (22nd March) the need to conserve water is reinforced in different ways. Not only this, forests form a complete ecosystem that includes various living organisms such as trees, shrubs, plants, microorganisms, wild animals and birds. Answer: The sun’s heat causes evaporation of water, flowing down to stream or drains into water vapour. Water cycle is a simple to understand process. As shown in the image above, the water cycle is a natural process that is continuous in nature. Liquid water is found in oceans, rivers, lakes—and even underground. Water cycle for class 5-7 1. Answer: Tsunami is a Japanese word that means ‘Barbour Waves’ as the harbors get destroyed whenever there is Tsunami. The seeping down of rainwater into the groundwater is called infiltration. Distribution of Water ... leakage of poisonous chemicals, breach in dams, air or water pollution, industrial accidents and epidemics. Water vapor—a gas—is found in Earth’s atmosphere. 3)Rain may fall directly into the ocean also.Some … Q13. The mechanism of drip irrigation is shown in the figure given below: Role for Saving Water The strong gravitational pull exerted by the sun and the moon on the earth’s surface causes the tides. Large scale deforestation has occurred to accommodate the growing population to grow food for them and to provide space for industries. Most of the time, it is the groundwater. Answer:  During high tide waves rise high and water covers much of the shore. Water that evaporates from Earth’s oceans, lakes, rivers, and moist soil rises up into the atmosphere. Importance of Water – Short Essay 1. Ground water, surface water, water vapours, water droplets, clouds. The various effects of water scarcity on plants are. Our careless use of water has created several problems. However, water might seem abundant but it is a very limited. Therefore, farmers have to use groundwater for irrigation. Once the water vapor rises high enough it condenses into water droplets. Water constitutes of almost 71% of the Earth’s surface. Water scarcity will affect nutrient uptake from soil by the plants. Water cycle. The Water CycleThe Water Cycle • The water cycle isThe water cycle is composed of manycomposed of many parts.parts. We drink water whenever we feel thirsty. The water cycle is the endless process that connects all of that water. Precipitation is water that falls from clouds in the sky.It may be rain (liquid) if it is warm, or it may be frozen if it is cold. When the water vapour cools down, it condenses and forms clouds. The air over the land becomes hotter and rises up. It’s probably one of the reasons why earth is the only planet that supports life. Scanty rainfall, deforestation and decrease in the effective area for seepage of water may also deplete the water table. Educate people about water wise habits which can be developed gradually and will last life long once developed. 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