NCERT Solutions Class 6 Science Chapter 14

NCERT Solutions for Class 6 Science Chapter 14

Water is an extremely important part of our lives. So much so that without it, life is not even possible. We use water every day for a number of activities including drinking, cooking, cleaning, taking a bath, and much more. In this chapter of the Class 6 Science NCERT, students will learn about the importance of water, where we get our water from, the water cycle and a few other topics.

In order to help students with their preparation for this chapter, Extramarks offers NCERT Solutions for Class 6 Science Chapter 14. These are thoroughly explained solutions to all the textbook questions covered at the end of this chapter. If students ever get stuck on a question or wish to get better at framing their own solutions, they can always refer to NCERT Solutions for Class 6 Science Chapter. Students will find these solutions to be very useful in their preparations and last-minute revisions.

NCERT Class 6 Science Other Chapters Solutions

NCERT Solutions for Class 6 Science Chapter 14- Water 

A student’s Science preparation is incomplete unless they solve all the questions given at the end of each chapter of their NCERT textbook. This is because practising helps students understand concepts better. Also, since many of the exam questions follow a very similar pattern as the questions given in NCERT textbooks, students can score much higher if they have solved NCERT questions.

With NCERT Solutions for Class 6 Science, students will not only be able to understand how they should frame their answers in final exams, but they can also refer to these solutions if they ever get stuck on a problem given at the end of the chapter. Students can use the links provided here to access these solutions.

Chapter 14– Water

Chapter 14 of NCERT Solutions for Class 6 Science is all about water and how essential it is for the survival of all living things on this planet. The chapter also discusses many other important topics including evaporation, rainfall, floods, condensation, droughts and use of freshwater etc.

The important topics covered in NCERT for Class 6 Science Chapter 14 Water include the following:

  • How much water do we use?
  • Where do we get water from?
  • Water cycle
  • Loss of Water by Plants
  • How are clouds formed?
  • Back to the oceans
  • What if it rains heavily?
  • What happens if it does not rain for a long period?
  • How can we conserve water?

NCERT Solutions for Class 6 Science Chapters

This chapter covers the fundamental basics of water. It starts with bringing up the primary uses of water in everyday life. Thereafter, an estimation of the quantity of water used every day is illustrated using an activity. Next, the sources of water like lakes, ponds, rivers, and oceans are cited. Subsequently, a few essential principles like the water cycle and cloud formation are comprehensively discussed via activities. 

The ways in which water falls back on the land (for example-snow, rainwater etc.) are explained. The term groundwater is also illustrated. In the later sections, the two extreme situations of water abundance and water shortage i.e. floods and drought are discussed. Furthermore, the chapter also discusses several means for the conservation of water. 

Use of Water

Water is used for numerous purposes in our daily life like cooking, washing, drinking etc. Flowing water is also used to generate energy with the help of hydroelectric plants. However, in the recent past, there has been a sharp increase in water wastage and use. If this continues being so, fresh water will become a scarce resource in future. The study of Chapter 14 will help you understand all the different uses of water in much more detail.

The Source of Water

There are many sources of water on Earth. These include ponds, lakes, wells, rivers, seas and so on. Sometimes, the water sources are not appropriate for drinking, like that of seas and oceans, and thus, water needs to be fetched from these sources and purified in various ways to make it appropriate for drinking.

Water Cycle

The water cycle is the entire process of how water moves and transforms from one form to another within the Earth and the atmosphere. It starts with water evaporating from oceans and other water bodies to rise up in the atmosphere. It then condenses to form clouds and later precipitates in the form of rainfall and merges again with the water bodies on the Earth’s surface. This entire process keeps on happening continuously. Students will learn a great deal about the water cycle in this chapter.

Transpiration

Class 6 Science Chapter 14 states that transpiration is the process through which water evaporates from a surface and rises into the atmosphere. Plants contribute to the water cycle as well. With the help of the water cycle, it is possible to make use of ocean water. Due to the saline nature of ocean water, using it directly as a source is not possible. The water that evaporates from the ocean separates from salt to form clouds in the air. When the warm air rises into the atmosphere, the cold air above forces the occurrence of saturation and condensation follows, leading to the formation of tiny droplets of water.  

The accumulation of clouds causes rainfall on Earth. Rainfall fills up the sources of water like lakes, ponds, and rivers again to satisfy human and animal needs. The rainwater is also absorbed by the soil, leading to an increase in the levels of groundwater sources. To learn about how to write answers in this section, refer to the NCERT Solutions for Class 6 Science Chapter 14.

States of Water

The ice from the refrigerator or the snow in the mountains is nothing but water in solid form. We, humans, make ice by refrigerating water by keeping it inside a freezer. Snow is a natural form of water in a solid state; it occurs in areas that are prone to freezing winters. Here, the little droplets of water in the clouds shower in the form of snow.

The water that is normally available through taps and the one that we consume is in the liquid state.

The gaseous state of water is known as water vapour or steam. It is naturally available in the air. As it is odourless and colourless in nature, we cannot smell or see water vapour. However, steam can be made by humans and is seen in some cases when it comes out in a large amount. For this, consider boiling water in a beaker and when it becomes too hot, you can see steam coming out from the water.

Key Features of NCERT Solutions for Class 6 Science Chapter 14

NCERT Solutions for Class 6 Science Chapter 14 available on Extramarks will help students with their preparation of this chapter in the following ways:

  • They have been prepared as per the latest syllabus prescribed by CBSE. 
  • The use of easy and simple language in the study materials and detailed explanations included in it will make the solutions easy to understand for students.
  • Subject matter experts give special attention to accuracy when drafting these solutions making sure that students can rely on them for their studies.
  • Students will find these solutions to be very helpful with their preparation, last-minute revisions, and for any help that they need with their assignments.

Q.1 Fill up the blanks in the following:

(a) The process of changing of water into its vapour is called _________.

(b) The process of changing water vapour into water is called _________.

(c) No rainfall for a year or more may lead to ________ in that region.

(d) Excessive rains may cause _________.

(a) The process of changing of water into its vapour is called evaporation.

(b) The process of changing water vapour into water is called condensation.

(c) No rainfall for a year or more may lead to drought in that region.

(d) Excessive rains may cause flood.

Q.2 State for each of the following whether it is due to evaporation or condensation:

(a) Water drops appear on the outer surface of a glass containing cold water.

(b) Steam rising from wet clothes while they are ironed.

(c) Fog appearing on a cold winter morning.

(d) Blackboard dries up after wiping it.

(e) Steam rising from a hot girdle when water is sprinkled on it.

(a) Water drops appear on the outer surface of a glass containing cold water. (Condensation)

(b) Steam rising from wet clothes while they are ironed. (Evaporation)

(c) Fog appearing on a cold winter morning. (Condensation)

(d) Blackboard dries up after wiping it. (Evaporation)

(e) Steam rising from a hot girdle when water is sprinkled on it. (Evaporation)

Q.3 Which of the following statements are “true”?

(a) Water vapour is present in the air only during the monsoon. ( )

(b) Water evaporates into the air from oceans, rivers, and lakes but not from the soil. ( )

(c) The process of water changing into its vapour, is called evaporation. ( )

(d) The evaporation of water takes place only in sunlight. ( )

(e) Water vapour condenses to form tiny droplets of water in the upper layers of air where it is cooler. ( )

(a) Water vapour is present in the air only during the monsoon. (False)

(b) Water evaporates into the air from oceans, rivers, and lakes but not from the soil. (False)

(c) The process of water changing into its vapour, is called evaporation. (True)

(d) The evaporation of water takes place only in sunlight. ( False)

(e) Water vapour condenses to form tiny droplets of water in the upper layers of air where it is cooler. (True)

Q.4 Suppose you want to dry your school uniform quickly. Would spreading it near an anghiti or heater help? If yes, how?

Yes, spreading of school uniform near an anghiti or heater would help to dry it quickly. Heat generated from anghiti or heater will warm up the surroundings. Water evaporates at faster rate in warm surroundings. Therefore, school uniform will dry up quickly by spreading it near an anghiti.

Q.5 Take out a cooled bottle of water from refrigerator and keep it on a table. After some time you notice a puddle of water around it. Why?

Puddle of water is observed due to condensation of water vapours present in air around the surface of bottle.The water vapours present around the surface of the bottle touch the ice-cold surface of the bottle and get converted to water droplets.

Q.6 To clean their spectacles, people often breathe out on glasses to make them wet. Explain why the glasses become wet.

When we breathe out, water vapours along with carbon dioxide are released. If we breathe out on glasses, the released water vapours collide with surface of the glass and condense, thereby making it wet.

Q.7 How are clouds formed?

Water from water bodies and plants is transferred to air through evaporation and transpiration. When the air (laden with water vapours) moves up, it gets cooler and cooler. At sufficient heights, the air becomes so cool that the water vapour present in it condenses to form tiny drops of water called droplets. These tiny droplets remain floating in air and appear to us as clouds.

Q.8 When does a drought occur?

Drought occurs when there is insufficient or no rain in a region for a long time. The soil continues to lose water by evaporation and transpiration. Since it is not being brought back by rain, the soil becomes dry. The level of water in ponds and wells of the region goes down and some of them even dry up. The level of ground water also goes down. These conditions lead to drought.

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FAQs (Frequently Asked Questions)

There are four stages in the process of the water cycle:

  • Evaporation: Water evaporates from various sources of water due to heat from the sun. In the form of a gaseous state, the water then rises to the sky. This is called evaporation.
  • Condensation: The water vapour upon cooling becomes liquid again and forms clouds in the atmosphere. This is called condensation. 
  • Precipitation: The process in which water comes down from the clouds in the form of rain, hail, sleet or snow.
  • Collection: The process in which the various sources of water from where water is evaporated, recollect to evaporate once again.

Only 2.5 % of water available on Earth is freshwater. Therefore, it is of immense importance for human beings. Freshwater is used by humans for commercial purposes at various facilities, hotels, motels, etc. Apart from this, it is also used for domestic purposes as well as drinking.

The process of condensation plays an important role in bringing the evaporated water back to the surface of the earth. As we go higher from the surface of the earth, the temperature drops, and it becomes cooler. So as the air moves up, it gets cooler and cooler. At sufficient heights, it eventually becomes so cool that the water vapour present in it condenses to form tiny drops of water. It is these tiny droplets that remain floating in the air and appear to us like clouds.

 

The first way of conservation of water is by building dams and tanks which not only help in preserving water but also in recharging the groundwater. The second way can be through rainwater harvesting and collecting the water on rooftops. One can also keep a check on the discharge of industrial wastes into the water due to which river pollution takes place.